PT-2026-67289 · Traefik · Traefik

B1Gn0Se · CVE-2026-67309 · Published 2026-08-01 · Updated 2026-08-01

Positive Technologies (AI Summary)

CVSS v4.0

7.8

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N

Name of the Vulnerable Software and Affected Versions Traefik versions 3.7.0 through 3.7.7

Description A path traversal issue exists in the Kubernetes Ingress NGINX provider's RewriteTarget middleware, which is generated from the nginx.ingress.kubernetes.io/rewrite-target annotation. When an Ingress path utilizes a regex that captures attacker-controlled text without requiring a path separator, a crafted request can be rewritten to a dot-segment traversal path. Because the system forwards the request without post-replacement normalization validation, a backend that normalizes dot segments may resolve the path to a protected endpoint. This allows an attacker to bypass route-level authentication mechanisms such as BasicAuth, DigestAuth, or ForwardAuth.

Recommendations Update to version 3.7.8.

Exploit

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2026-67309

GHSA-8RXV-JG7P-WVG3

Affected Products

Traefik

References · 8

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67309.json · Exploit
• https://github.com/traefik/traefik/commit/69259c3acc9d4bdc065cb2e3b83336f7de3e7038 · Patch
• https://github.com/traefik/traefik/security/advisories/GHSA-8rxv-jg7p-wvg3 · Vendor Advisory
• https://github.com/traefik/traefik/commit/b93f02cd07b79490fb8c8f02e301a7a1ec553195 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-67309 · Security Note
• https://osv.dev/vulnerability/CVE-2026-67309 · Vendor Advisory
• https://vulncheck.com/advisories/traefik-path-traversal-via-rewritetarget-authentication-bypass · Note
• https://t.me/cveNotify/232412 · Telegram Post