CVE catalog
CVE-2026-65600
Traefik versions <= v2.11.51, >= v3.6.0 <= v3.6.22, and >= v3.7.0 <= v3.7.6 contain an authentication bypass via path traversal in the ReplacePathRegex middleware. When ReplacePathRegex is configured
- Severity
- Critical · CVSS 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.62% · Oct 25, 2026
Traefik versions <= v2.11.51, >= v3.6.0 <= v3.6.22, and >= v3.7.0 <= v3.7.6 contain an authentication bypass via path traversal in the ReplacePathRegex middleware. When ReplacePathRegex is configured with a regex that captures user-controlled path segments without a mandatory path separator (e.g. regex "^/api(.*)", replacement "/$1"), the middleware forwards the replaced path to the backend without validating that it matches its normalized form. An unauthenticated remote attacker can send a crafted request (e.g. GET /api../admin) that produces an un-normalized path such as /../admin, which a backend that normalizes paths resolves to a protected route, bypassing authentication middleware. Fixed in v2.11.52, v3.6.23, and v3.7.7.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Go | github.com/traefik/traefik/v2 | Not reported | 2.11.52 | fixed |
| Go | github.com/traefik/traefik/v3 | Not reported | 3.6.23 | fixed |
| Go | github.com/traefik/traefik/v3 | Not reported | 3.7.7 | fixed |
| Go | github.com/traefik/traefik | Not reported | Not reported | unknown |
| Cpe | traefik | Not reported | 3.7.7 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Go | github.com/traefik/traefik/v2 | go | Not reported | 2.11.52 | Not reported | Not reported | Not reported |
| Go | github.com/traefik/traefik/v3 | go | Not reported | 3.6.23 | Not reported | Not reported | Not reported |
| Go | github.com/traefik/traefik/v3 | go | Not reported | 3.7.7 | Not reported | Not reported | Not reported |
| Cpe | traefik | cpe | Not reported | 3.7.7 | Not reported | NVD-CVE-2026-65600 | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed:
References
- [https://github.com/advisories/GHSA-cxjq-mrr5-89rv]
- [https://github.com/traefik/traefik/security/advisories/GHSA-cxjq-mrr5-89rv]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-65600]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-65600.json]
- [https://www.vulncheck.com/advisories/traefik-before-authentication-bypass-via-replacepathregex]
[FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [Red Hat security advisories and VEX]