CVE-2026-11856

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-11856
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-11856.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-11856
Aliases
Downstream
ALPINE (1)
AZL (2)
BELL (1)
CGA (21)
DEBIAN (1)
ECHO (1)
JLSEC (1)
MINI (2)
openSUSE (1)
RHSA (3)
RLSA (1)
ROOT (9)
UBUNTU (1)
Related
Published
2026-07-03T06:13:31Z
Modified
2026-09-22T12:41:42Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
cross-origin Digest auth state leak
Details

Successfully using libcurl to do a transfer to a specific HTTP origin (hostA) with Digest authentication and then changing the origin to a different one (hostB) for a second transfer, reusing the same handle, makes libcurl wrongly pass on the Authorization: header field meant for hostA, to hostB.

Database specific 
{
    "cna_assigner":  "curl",
    "cwe_ids":  [
        "CWE-294"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/11xxx/CVE-2026-11856.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "introduced":  "7.10.6"
                },
                {
                    "fixed":  "8.14.2"
                },
                {
                    "introduced":  "8.15.0"
                },
                {
                    "fixed":  "8.16.1"
                },
                {
                    "introduced":  "8.17.0"
                },
                {
                    "fixed":  "8.20.1"
                },
                {
                    "introduced":  "334d78cd18a7310144383929bdcef34ffbf6159b"
                },
                {
                    "fixed":  "5c6b4880357ab3e72967c1c45cae0f96ffabc535"
                }
            ],
            "source":  "AFFECTED_FIELD"
        }
    ]
}
References

Affected packages

Git / github.com/curl/curl

Affected ranges

Type
GIT
Repo
https://github.com/curl/curl
Events
Introduced
a05f34973e6c4bb629d018f7cb51487be1c904d8
Fixed
68720b4837284335b2d63cb358f8f6ce65f5bc55
Database specific
Show details 
{
    "cpe":  "cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*",
    "extracted_events":  [
        {
            "introduced":  "8.20.0"
        },
        {
            "last_affected":  "8.20.0"
        },
        {
            "introduced":  "8.19.0"
        },
        {
            "last_affected":  "8.19.0"
        },
        {
            "introduced":  "8.18.0"
        },
        {
            "last_affected":  "8.18.0"
        },
        {
            "introduced":  "8.17.0"
        },
        {
            "last_affected":  "8.17.0"
        },
        {
            "introduced":  "8.16.0"
        },
        {
            "last_affected":  "8.16.0"
        },
        {
            "introduced":  "8.15.0"
        },
        {
            "last_affected":  "8.15.0"
        },
        {
            "introduced":  "8.14.1"
        },
        {
            "last_affected":  "8.14.1"
        },
        {
            "introduced":  "8.14.0"
        },
        {
            "last_affected":  "8.14.0"
        },
        {
            "introduced":  "8.13.0"
        },
        {
            "last_affected":  "8.13.0"
        },
        {
            "introduced":  "8.12.1"
        },
        {
            "last_affected":  "8.12.1"
        },
        {
            "introduced":  "8.12.0"
        },
        {
            "last_affected":  "8.12.0"
        },
        {
            "introduced":  "8.11.1"
        },
        {
            "last_affected":  "8.11.1"
        },
        {
            "introduced":  "8.11.0"
        },
        {
            "last_affected":  "8.11.0"
        },
        {
            "introduced":  "8.10.1"
        },
        {
            "last_affected":  "8.10.1"
        },
        {
            "introduced":  "8.10.0"
        },
        {
            "last_affected":  "8.10.0"
        },
        {
            "introduced":  "8.9.1"
        },
        {
            "last_affected":  "8.9.1"
        },
        {
            "introduced":  "8.9.0"
        },
        {
            "last_affected":  "8.9.0"
        },
        {
            "introduced":  "8.8.0"
        },
        {
            "last_affected":  "8.8.0"
        },
        {
            "introduced":  "8.7.1"
        },
        {
            "last_affected":  "8.7.1"
        },
        {
            "introduced":  "8.7.0"
        },
        {
            "last_affected":  "8.7.0"
        },
        {
            "introduced":  "8.6.0"
        },
        {
            "last_affected":  "8.6.0"
        },
        {
            "introduced":  "8.5.0"
        },
        {
            "last_affected":  "8.5.0"
        },
        {
            "introduced":  "8.4.0"
        },
        {
            "last_affected":  "8.4.0"
        },
        {
            "introduced":  "8.3.0"
        },
        {
            "last_affected":  "8.3.0"
        },
        {
            "introduced":  "8.2.1"
        },
        {
            "last_affected":  "8.2.1"
        },
        {
            "introduced":  "8.2.0"
        },
        {
            "last_affected":  "8.2.0"
        },
        {
            "introduced":  "8.1.2"
        },
        {
            "last_affected":  "8.1.2"
        },
        {
            "introduced":  "8.1.1"
        },
        {
            "last_affected":  "8.1.1"
        },
        {
            "introduced":  "8.1.0"
        },
        {
            "last_affected":  "8.1.0"
        },
        {
            "introduced":  "8.0.1"
        },
        {
            "last_affected":  "8.0.1"
        },
        {
            "introduced":  "8.0.0"
        },
        {
            "last_affected":  "8.0.0"
        },
        {
            "introduced":  "7.88.1"
        },
        {
            "last_affected":  "7.88.1"
        },
        {
            "introduced":  "7.88.0"
        },
        {
            "last_affected":  "7.88.0"
        },
        {
            "introduced":  "7.87.0"
        },
        {
            "last_affected":  "7.87.0"
        },
        {
            "introduced":  "7.86.0"
        },
        {
            "last_affected":  "7.86.0"
        },
        {
            "introduced":  "7.85.0"
        },
        {
            "last_affected":  "7.85.0"
        },
        {
            "introduced":  "7.84.0"
        },
        {
            "last_affected":  "7.84.0"
        },
        {
            "introduced":  "7.83.1"
        },
        {
            "last_affected":  "7.83.1"
        },
        {
            "introduced":  "7.83.0"
        },
        {
            "last_affected":  "7.83.0"
        },
        {
            "introduced":  "7.82.0"
        },
        {
            "last_affected":  "7.82.0"
        },
        {
            "introduced":  "7.81.0"
        },
        {
            "last_affected":  "7.81.0"
        },
        {
            "introduced":  "7.80.0"
        },
        {
            "last_affected":  "7.80.0"
        },
        {
            "introduced":  "7.79.1"
        },
        {
            "last_affected":  "7.79.1"
        },
        {
            "introduced":  "7.79.0"
        },
        {
            "last_affected":  "7.79.0"
        },
        {
            "introduced":  "7.78.0"
        },
        {
            "last_affected":  "7.78.0"
        },
        {
            "introduced":  "7.77.0"
        },
        {
            "last_affected":  "7.77.0"
        },
        {
            "introduced":  "7.76.1"
        },
        {
            "last_affected":  "7.76.1"
        },
        {
            "introduced":  "7.76.0"
        },
        {
            "last_affected":  "7.76.0"
        },
        {
            "introduced":  "7.75.0"
        },
        {
            "last_affected":  "7.75.0"
        },
        {
            "introduced":  "7.74.0"
        },
        {
            "last_affected":  "7.74.0"
        },
        {
            "introduced":  "7.73.0"
        },
        {
            "last_affected":  "7.73.0"
        },
        {
            "introduced":  "7.72.0"
        },
        {
            "last_affected":  "7.72.0"
        },
        {
            "introduced":  "7.71.1"
        },
        {
            "last_affected":  "7.71.1"
        },
        {
            "introduced":  "7.71.0"
        },
        {
            "last_affected":  "7.71.0"
        },
        {
            "introduced":  "7.70.0"
        },
        {
            "last_affected":  "7.70.0"
        },
        {
            "introduced":  "7.69.1"
        },
        {
            "last_affected":  "7.69.1"
        },
        {
            "introduced":  "7.69.0"
        },
        {
            "last_affected":  "7.69.0"
        },
        {
            "introduced":  "7.68.0"
        },
        {
            "last_affected":  "7.68.0"
        },
        {
            "introduced":  "7.67.0"
        },
        {
            "last_affected":  "7.67.0"
        },
        {
            "introduced":  "7.66.0"
        },
        {
            "last_affected":  "7.66.0"
        },
        {
            "introduced":  "7.65.3"
        },
        {
            "last_affected":  "7.65.3"
        },
        {
            "introduced":  "7.65.2"
        },
        {
            "last_affected":  "7.65.2"
        },
        {
            "introduced":  "7.65.1"
        },
        {
            "last_affected":  "7.65.1"
        },
        {
            "introduced":  "7.65.0"
        },
        {
            "last_affected":  "7.65.0"
        },
        {
            "introduced":  "7.64.1"
        },
        {
            "last_affected":  "7.64.1"
        },
        {
            "introduced":  "7.64.0"
        },
        {
            "last_affected":  "7.64.0"
        },
        {
            "introduced":  "7.63.0"
        },
        {
            "last_affected":  "7.63.0"
        },
        {
            "introduced":  "7.62.0"
        },
        {
            "last_affected":  "7.62.0"
        },
        {
            "introduced":  "7.61.1"
        },
        {
            "last_affected":  "7.61.1"
        },
        {
            "introduced":  "7.61.0"
        },
        {
            "last_affected":  "7.61.0"
        },
        {
            "introduced":  "7.60.0"
        },
        {
            "last_affected":  "7.60.0"
        },
        {
            "introduced":  "7.59.0"
        },
        {
            "last_affected":  "7.59.0"
        },
        {
            "introduced":  "7.58.0"
        },
        {
            "last_affected":  "7.58.0"
        },
        {
            "introduced":  "7.57.0"
        },
        {
            "last_affected":  "7.57.0"
        },
        {
            "introduced":  "7.56.1"
        },
        {
            "last_affected":  "7.56.1"
        },
        {
            "introduced":  "7.56.0"
        },
        {
            "last_affected":  "7.56.0"
        },
        {
            "introduced":  "7.55.1"
        },
        {
            "last_affected":  "7.55.1"
        },
        {
            "introduced":  "7.55.0"
        },
        {
            "last_affected":  "7.55.0"
        },
        {
            "introduced":  "7.54.1"
        },
        {
            "last_affected":  "7.54.1"
        },
        {
            "introduced":  "7.54.0"
        },
        {
            "last_affected":  "7.54.0"
        },
        {
            "introduced":  "7.53.1"
        },
        {
            "last_affected":  "7.53.1"
        },
        {
            "introduced":  "7.53.0"
        },
        {
            "last_affected":  "7.53.0"
        },
        {
            "introduced":  "7.52.1"
        },
        {
            "last_affected":  "7.52.1"
        },
        {
            "introduced":  "7.52.0"
        },
        {
            "last_affected":  "7.52.0"
        },
        {
            "introduced":  "7.51.0"
        },
        {
            "last_affected":  "7.51.0"
        },
        {
            "introduced":  "7.50.3"
        },
        {
            "last_affected":  "7.50.3"
        },
        {
            "introduced":  "7.50.2"
        },
        {
            "last_affected":  "7.50.2"
        },
        {
            "introduced":  "7.50.1"
        },
        {
            "last_affected":  "7.50.1"
        },
        {
            "introduced":  "7.50.0"
        },
        {
            "last_affected":  "7.50.0"
        },
        {
            "introduced":  "7.49.1"
        },
        {
            "last_affected":  "7.49.1"
        },
        {
            "introduced":  "7.49.0"
        },
        {
            "last_affected":  "7.49.0"
        },
        {
            "introduced":  "7.48.0"
        },
        {
            "last_affected":  "7.48.0"
        },
        {
            "introduced":  "7.47.1"
        },
        {
            "last_affected":  "7.47.1"
        },
        {
            "introduced":  "7.47.0"
        },
        {
            "last_affected":  "7.47.0"
        },
        {
            "introduced":  "7.46.0"
        },
        {
            "last_affected":  "7.46.0"
        },
        {
            "introduced":  "7.45.0"
        },
        {
            "last_affected":  "7.45.0"
        },
        {
            "introduced":  "7.44.0"
        },
        {
            "last_affected":  "7.44.0"
        },
        {
            "introduced":  "7.43.0"
        },
        {
            "last_affected":  "7.43.0"
        },
        {
            "introduced":  "7.42.1"
        },
        {
            "last_affected":  "7.42.1"
        },
        {
            "introduced":  "7.42.0"
        },
        {
            "last_affected":  "7.42.0"
        },
        {
            "introduced":  "7.41.0"
        },
        {
            "last_affected":  "7.41.0"
        },
        {
            "introduced":  "7.40.0"
        },
        {
            "last_affected":  "7.40.0"
        },
        {
            "introduced":  "7.39.0"
        },
        {
            "last_affected":  "7.39.0"
        },
        {
            "introduced":  "7.38.0"
        },
        {
            "last_affected":  "7.38.0"
        },
        {
            "introduced":  "7.37.1"
        },
        {
            "last_affected":  "7.37.1"
        },
        {
            "introduced":  "7.37.0"
        },
        {
            "last_affected":  "7.37.0"
        },
        {
            "introduced":  "7.36.0"
        },
        {
            "last_affected":  "7.36.0"
        },
        {
            "introduced":  "7.35.0"
        },
        {
            "last_affected":  "7.35.0"
        },
        {
            "introduced":  "7.34.0"
        },
        {
            "last_affected":  "7.34.0"
        },
        {
            "introduced":  "7.33.0"
        },
        {
            "last_affected":  "7.33.0"
        },
        {
            "introduced":  "7.32.0"
        },
        {
            "last_affected":  "7.32.0"
        },
        {
            "introduced":  "7.31.0"
        },
        {
            "last_affected":  "7.31.0"
        },
        {
            "introduced":  "7.30.0"
        },
        {
            "last_affected":  "7.30.0"
        },
        {
            "introduced":  "7.29.0"
        },
        {
            "last_affected":  "7.29.0"
        },
        {
            "introduced":  "7.28.1"
        },
        {
            "last_affected":  "7.28.1"
        },
        {
            "introduced":  "7.28.0"
        },
        {
            "last_affected":  "7.28.0"
        },
        {
            "introduced":  "7.27.0"
        },
        {
            "last_affected":  "7.27.0"
        },
        {
            "introduced":  "7.26.0"
        },
        {
            "last_affected":  "7.26.0"
        },
        {
            "introduced":  "7.25.0"
        },
        {
            "last_affected":  "7.25.0"
        },
        {
            "introduced":  "7.24.0"
        },
        {
            "last_affected":  "7.24.0"
        },
        {
            "introduced":  "7.23.1"
        },
        {
            "last_affected":  "7.23.1"
        },
        {
            "introduced":  "7.23.0"
        },
        {
            "last_affected":  "7.23.0"
        },
        {
            "introduced":  "7.22.0"
        },
        {
            "last_affected":  "7.22.0"
        },
        {
            "introduced":  "7.21.7"
        },
        {
            "last_affected":  "7.21.7"
        },
        {
            "introduced":  "7.21.6"
        },
        {
            "last_affected":  "7.21.6"
        },
        {
            "introduced":  "7.21.5"
        },
        {
            "last_affected":  "7.21.5"
        },
        {
            "introduced":  "7.21.4"
        },
        {
            "last_affected":  "7.21.4"
        },
        {
            "introduced":  "7.21.3"
        },
        {
            "last_affected":  "7.21.3"
        },
        {
            "introduced":  "7.21.2"
        },
        {
            "last_affected":  "7.21.2"
        },
        {
            "introduced":  "7.21.1"
        },
        {
            "last_affected":  "7.21.1"
        },
        {
            "introduced":  "7.21.0"
        },
        {
            "last_affected":  "7.21.0"
        },
        {
            "introduced":  "7.20.1"
        },
        {
            "last_affected":  "7.20.1"
        },
        {
            "introduced":  "7.20.0"
        },
        {
            "last_affected":  "7.20.0"
        },
        {
            "introduced":  "7.19.7"
        },
        {
            "last_affected":  "7.19.7"
        },
        {
            "introduced":  "7.19.6"
        },
        {
            "last_affected":  "7.19.6"
        },
        {
            "introduced":  "7.19.5"
        },
        {
            "last_affected":  "7.19.5"
        },
        {
            "introduced":  "7.19.4"
        },
        {
            "last_affected":  "7.19.4"
        },
        {
            "introduced":  "7.19.3"
        },
        {
            "last_affected":  "7.19.3"
        },
        {
            "introduced":  "7.19.2"
        },
        {
            "last_affected":  "7.19.2"
        },
        {
            "introduced":  "7.19.1"
        },
        {
            "last_affected":  "7.19.1"
        },
        {
            "introduced":  "7.19.0"
        },
        {
            "last_affected":  "7.19.0"
        },
        {
            "introduced":  "7.18.2"
        },
        {
            "last_affected":  "7.18.2"
        },
        {
            "introduced":  "7.18.1"
        },
        {
            "last_affected":  "7.18.1"
        },
        {
            "introduced":  "7.18.0"
        },
        {
            "last_affected":  "7.18.0"
        },
        {
            "introduced":  "7.17.1"
        },
        {
            "last_affected":  "7.17.1"
        },
        {
            "introduced":  "7.17.0"
        },
        {
            "last_affected":  "7.17.0"
        },
        {
            "introduced":  "7.16.4"
        },
        {
            "last_affected":  "7.16.4"
        },
        {
            "introduced":  "7.16.3"
        },
        {
            "last_affected":  "7.16.3"
        },
        {
            "introduced":  "7.16.2"
        },
        {
            "last_affected":  "7.16.2"
        },
        {
            "introduced":  "7.16.1"
        },
        {
            "last_affected":  "7.16.1"
        },
        {
            "introduced":  "7.16.0"
        },
        {
            "last_affected":  "7.16.0"
        },
        {
            "introduced":  "7.15.5"
        },
        {
            "last_affected":  "7.15.5"
        },
        {
            "introduced":  "7.15.4"
        },
        {
            "last_affected":  "7.15.4"
        },
        {
            "introduced":  "7.15.3"
        },
        {
            "last_affected":  "7.15.3"
        },
        {
            "introduced":  "7.15.2"
        },
        {
            "last_affected":  "7.15.2"
        },
        {
            "introduced":  "7.15.1"
        },
        {
            "last_affected":  "7.15.1"
        },
        {
            "introduced":  "7.15.0"
        },
        {
            "last_affected":  "7.15.0"
        },
        {
            "introduced":  "7.14.1"
        },
        {
            "last_affected":  "7.14.1"
        },
        {
            "introduced":  "7.14.0"
        },
        {
            "last_affected":  "7.14.0"
        },
        {
            "introduced":  "7.13.2"
        },
        {
            "last_affected":  "7.13.2"
        },
        {
            "introduced":  "7.13.1"
        },
        {
            "last_affected":  "7.13.1"
        },
        {
            "introduced":  "7.13.0"
        },
        {
            "last_affected":  "7.13.0"
        },
        {
            "introduced":  "7.12.3"
        },
        {
            "last_affected":  "7.12.3"
        },
        {
            "introduced":  "7.12.2"
        },
        {
            "last_affected":  "7.12.2"
        },
        {
            "introduced":  "7.12.1"
        },
        {
            "last_affected":  "7.12.1"
        },
        {
            "introduced":  "7.12.0"
        },
        {
            "last_affected":  "7.12.0"
        },
        {
            "introduced":  "7.11.2"
        },
        {
            "last_affected":  "7.11.2"
        },
        {
            "introduced":  "7.11.1"
        },
        {
            "last_affected":  "7.11.1"
        },
        {
            "introduced":  "7.11.0"
        },
        {
            "last_affected":  "7.11.0"
        },
        {
            "introduced":  "7.10.8"
        },
        {
            "last_affected":  "7.10.8"
        },
        {
            "introduced":  "7.10.7"
        },
        {
            "last_affected":  "7.10.7"
        },
        {
            "introduced":  "7.10.6"
        },
        {
            "last_affected":  "7.10.6"
        },
        {
            "fixed":  "8.21.0"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ]
}

Affected versions

7.*
7.10.6
7.10.7
7.10.8
7.11.0
7.11.1
7.11.2
7.12.0
7.12.1
7.12.2
7.12.3
7.13.0
7.13.1
7.13.2
7.14.0
7.14.1
7.15.0
7.15.1
7.15.2
7.15.3
7.15.4
7.15.5
7.16.0
7.16.1
7.16.2
7.16.3
7.16.4
7.17.0
7.17.1
7.18.0
7.18.1
7.18.2
7.19.0
7.19.1
7.19.2
7.19.3
7.19.4
7.19.5
7.19.6
7.19.7
7.20.0
7.20.1
7.21.0
7.21.1
7.21.2
7.21.3
7.21.4
7.21.5
7.21.6
7.21.7
7.22.0
7.23.0
7.23.1
7.24.0
7.25.0
7.26.0
7.27.0
7.28.0
7.28.1
7.29.0
7.30.0
7.31.0
7.32.0
7.33.0
7.34.0
7.35.0
7.36.0
7.37.0
7.37.1
7.38.0
7.39.0
7.40.0
7.41.0
7.42.0
7.42.1
7.43.0
7.44.0
7.45.0
7.46.0
7.47.0
7.47.1
7.48.0
7.49.0
7.49.1
7.50.0
7.50.1
7.50.2
7.50.3
7.51.0
7.52.0
7.52.1
7.53.0
7.53.1
7.54.0
7.54.1
7.55.0
7.55.1
7.56.0
7.56.1
7.57.0
7.58.0
7.59.0
7.60.0
7.61.0
7.61.1
7.62.0
7.63.0
7.64.0
7.64.1
7.65.0
7.65.1
7.65.2
7.65.3
7.66.0
7.67.0
7.68.0
7.69.0
7.69.1
7.70.0
7.71.0
7.71.1
7.72.0
7.73.0
7.74.0
7.75.0
7.76.0
7.76.1
7.77.0
7.78.0
7.79.0
7.79.1
7.80.0
7.81.0
7.82.0
7.83.0
7.83.1
7.84.0
7.85.0
7.86.0
7.87.0
7.88.0
7.88.1
8.*
8.0.0
8.0.1
8.1.0
8.1.1
8.1.2
8.10.0
8.10.1
8.11.0
8.11.1
8.12.0
8.12.1
8.13.0
8.14.0
8.14.1
8.15.0
8.16.0
8.17.0
8.18.0
8.19.0
8.2.0
8.2.1
8.20.0
8.3.0
8.4.0
8.5.0
8.6.0
8.7.0
8.7.1
8.8.0
8.9.0
8.9.1
Other
curl-8_20_0
rc-8_21_0-1
rc-8_21_0-2
rc-8_21_0-3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-11856.json"