CVE-2026-67309

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-67309
Traefik versions >= v3.7.0 and <= v3.7.7 contain a path traversal vulnerability in the Kubernetes Ingress NGINX provider's RewriteTarget middleware (generated from the nginx.ingress.kubernetes.io/rewrite-target annotation). When an Ingress path uses a regex that captures attacker-controlled text without requiring a path separator (e.g., path /api(.*) with rewrite target /$1), a crafted request such as /api../admin matches the public router, is rewritten to a dot-segment traversal path (/../admin), and is forwarded without post-replacement normalization validation. A backend that normalizes dot segments resolves the path to a protected endpoint (e.g., /admin) reachable only through a separate router secured with BasicAuth, DigestAuth, or ForwardAuth, resulting in route-level authentication bypass. The issue is fixed in v3.7.8.

7.5 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://github.com/traefik/traefik/commit/69259c3acc9d4bdc065cb2e3b83336f7de3e7038 Patch
https://github.com/traefik/traefik/commit/b93f02cd07b79490fb8c8f02e301a7a1ec553195 Patch
https://github.com/traefik/traefik/security/advisories/GHSA-8rxv-jg7p-wvg3 Exploit Mitigation Patch Vendor Advisory
https://www.vulncheck.com/advisories/traefik-path-traversal-via-rewritetarget-authentication-bypass Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*
History

16 Sep 2026, 20:45

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.5
First Time Traefik
Traefik traefik
CPE cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*
References () https://github.com/traefik/traefik/commit/69259c3acc9d4bdc065cb2e3b83336f7de3e7038 - () https://github.com/traefik/traefik/commit/69259c3acc9d4bdc065cb2e3b83336f7de3e7038 - Patch
References () https://github.com/traefik/traefik/commit/b93f02cd07b79490fb8c8f02e301a7a1ec553195 - () https://github.com/traefik/traefik/commit/b93f02cd07b79490fb8c8f02e301a7a1ec553195 - Patch
References () https://github.com/traefik/traefik/security/advisories/GHSA-8rxv-jg7p-wvg3 - () https://github.com/traefik/traefik/security/advisories/GHSA-8rxv-jg7p-wvg3 - Exploit, Mitigation, Patch, Vendor Advisory
References () https://www.vulncheck.com/advisories/traefik-path-traversal-via-rewritetarget-authentication-bypass - () https://www.vulncheck.com/advisories/traefik-path-traversal-via-rewritetarget-authentication-bypass - Third Party Advisory
Information

Published : 2026-08-01 13:17

Updated : 2026-09-16 20:45

NVD link : CVE-2026-67309

Mitre link : CVE-2026-67309

CVE.ORG link : CVE-2026-67309

JSON object : View

Products Affected

traefik

  • traefik
CWE
CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')