Auth bypass in Traefik
CVE-2026-54761
Traefik is an HTTP reverse proxy and load balancer. Prior to 3.6.21 and 3.7.5, there is a high severity vulnerability in Traefik's Kubernetes Gateway provider affecting the crossProviderNamespaces allowlist. For HTTPRoute rules that declar…
EPSS: 0.003 (24.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N.
Affected products
- Traefik — versions < 3.6.21, >= 3.7.0-ea.1, < 3.7.5
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Patch, Mitigation, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC, Release Notes)
- security-advisories@github.com (Patch, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-54761?
- CVE-2026-54761 is a high-severity vulnerability in Traefik, classified under Improper Access Control. CVSS score: 7.1/10. Published 2026-06-23.
- How severe is CVE-2026-54761?
- High severity. CVSS v3 base score is 7.1 out of 10.
- Is CVE-2026-54761 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.