VDB
CVE-2026-54763
CVE-2026-54763
PUBLISHED
CVSS 7.800000190734863 HIGH
Traefik: Incomplete fix for CVE-2026-33433 + CVE-2026-39858 cross-cohort: headerField underscore-variant identity spoofing in BasicAuth / DigestAuth / ForwardAuth
EPSS 0.24% · 14.8th percentile
Risk Scores
CVSS 4.0
7.800000190734863
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
EPSS Score
0.24%
14.8th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| github.com | traefik/traefik/v3 | 0, 3.7.0, 0 |
| github.com | traefik/traefik/v2 | 0, 0, 0 |
| alpine | traefik | 0, 0, 0 |
| traefik | traefik | < 2.11.51, >= 3.0.0-beta1, < 3.6.22, >= 3.7.0-ea.1, < 3.7.6 |
Timeline
- Jul 1, 2026 CVE Published
- Jul 7, 2026 EPSS Score
- Jul 7, 2026 Coalition ESS Score
- Jul 8, 2026 CVE Updated
- Jul 9, 2026 Security Advisory
- Aug 7, 2026 EPSS Score
- Aug 24, 2026 EPSS Score
- Sep 1, 2026 EPSS Score
- Sep 12, 2026 EPSS Score
- Sep 17, 2026 EPSS Score
- Sep 18, 2026 EPSS Score
- Sep 24, 2026 EPSS Score
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-54763 advisory
- https://github.com/advisories/GHSA-x677-9fxg-v5c5 advisory
- https://github.com/traefik/traefik/security/advisories/GHSA-x677-9fxg-v5c5 url
- https://github.com/traefik/traefik/pull/13262 patch
- https://github.com/traefik/traefik/commit/108a5264473a2cbc8f12d6d691a3c6553cdf2c1b patch
- https://github.com/traefik/traefik/releases/tag/v2.11.51 url
- https://github.com/traefik/traefik/releases/tag/v3.6.22 url
- https://github.com/traefik/traefik/releases/tag/v3.7.6 url