CVE-2026-44431

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Source
https://cve.org/CVERecord?id=CVE-2026-44431
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44431.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-44431
Aliases
Downstream
AZL (1)
BELL (1)
CGA (365)
CLEANSTART (54)
CLSA (5)
DEBIAN (1)
ECHO (1)
MINI (29)
OESA (9)
openSUSE (3)
RHSA (24)
RLSA (9)
ROOT (1)
SUSE (15)
UBUNTU (1)
Related
ALSA (9)
openSUSE (3)
SUSE (15)
Published
2026-05-13T15:20:24Z
Modified
2026-10-21T02:57:58Z
Severity
  • 8.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
urllib3: Sensitive headers forwarded across origins in proxied low-level redirects
Details

urllib3 is an HTTP client library for Python. From 1.23 to before 2.7.0, cross-origin redirects followed from the low-level API via ProxyManager.connection_from_url().urlopen(..., assert_same_host=False) still forward these sensitive headers. This vulnerability is fixed in 2.7.0.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-200"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44431.json"
}
References

Affected packages

Git / github.com/urllib3/urllib3

Affected ranges

Type
GIT
Repo
https://github.com/urllib3/urllib3
Events
Introduced
7c216f433e39e184b84cbfa49e41135a89e4baa0
Fixed
9a950b92d999f906b6020bb2d1076ee56cddd5d2
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "1.23"
                },
                {
                    "fixed":  "2.7.0"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "cpe":  "cpe:2.3:a:python:urllib3:*:*:*:*:*:*:*:*",
            "range":  [
                {
                    "introduced":  "1.23"
                },
                {
                    "fixed":  "2.7.0"
                }
            ],
            "source":  "CPE_RANGE"
        }
    ]
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44431.json"