CVE-2026-35051

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Source
https://cve.org/CVERecord?id=CVE-2026-35051
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-35051.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-35051
Aliases
Downstream
Related
Published
2026-04-30T20:26:06.716Z
Modified
2026-05-18T06:00:04.112230828Z
Severity
  • 7.8 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N CVSS Calculator
Summary
Traefik: ForwardAuth trustForwardHeader=false allows spoofed X-Forwarded-Prefix to bypass auth
Details

Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.43, 3.6.14, and 3.7.0-rc.2, there is an authentication bypass vulnerability in Traefik's ForwardAuth middleware when trustForwardHeader=false is configured and Traefik is deployed behind a trusted upstream proxy. This issue has been patched in versions 2.11.43, 3.6.14, and 3.7.0-rc.2.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35051.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-345"
    ]
}
References

Affected packages

Git / github.com/traefik/traefik

Affected ranges

Type
GIT
Repo
https://github.com/traefik/traefik
Events
Introduced
67c64ed9b25fbb90f1086977a62827133a7aa01b
Fixed
a47e15f1299d23fec1bcbb78bece4325a40d63f2

Affected versions

v3.*
v3.7.0-ea.1
v3.7.0-ea.2
v3.7.0-ea.3
v3.7.0-rc.1

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-35051.json"