CVE-2026-11352

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-11352
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-11352.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-11352
Aliases
Downstream
Published
2026-07-03T06:12:10.777Z
Modified
2026-07-09T04:00:38.330001095Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
QUIC zero-length UDP datagrams busy-loop
Details

An issue in curl’s QUIC UDP receive function allows a malicious HTTP/3 server to trigger a remote denial of service against a curl or libcurl client. Because the helper function discards zero-length UDP datagrams before counting them toward the per-call packet budget, a connected QUIC peer can continuously stream empty datagrams to indefinitely stall the client.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/11xxx/CVE-2026-11352.json",
    "cna_assigner": "curl",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "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"
                }
            ]
        }
    ]
}
References

Affected packages

Git / github.com/curl/curl

Affected ranges

Type
GIT
Repo
https://github.com/curl/curl
Events
Introduced
2eebc58c4b8d68c98c8344381a9f6df4cca838fd
Fixed
68720b4837284335b2d63cb358f8f6ce65f5bc55
Database specific 
{
    "cpe": "cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "8.18.0"
        },
        {
            "fixed": "8.21.0"
        }
    ],
    "source": "CPE_RANGE"
}

Affected versions

Other
curl-8_18_0
curl-8_19_0
curl-8_20_0
rc-8_19_0-1
rc-8_19_0-2
rc-8_19_0-3
rc-8_20_0-1
rc-8_20_0-2
rc-8_20_0-3
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-2026-11352.json"