Improper Authentication Affecting traefik-3 package, versions <3.7.10-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-MINIMOSLATEST-TRAEFIK3-18589387
- published8 Aug 2026
- disclosed6 Aug 2026
Introduced: 6 Aug 2026
NewCVE-2026-71326 (opens in a new tab)How to fix?
Upgrade Minimos:latest traefik-3 to version 3.7.10-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream traefik-3 package and not the traefik-3 package as distributed by Minimos.
See How to fix? for Minimos:latest relevant fixed versions and status.
Traefik is an open source HTTP reverse proxy and load balancer. From 3.6.11 until 3.6.25 and 3.7.10, Traefik's BasicAuth middleware in pkg/middlewares/auth/basic_auth.go deduplicates concurrent password checks with a singleflight key built from the delimiter-free concatenation of password and secret, allowing an attacker who has a valid credential and the stored hash to authenticate as an unconfigured username when headerField trusts the forwarded identity. This issue is fixed in 3.6.25 and 3.7.10.
References
- https://www.cve.org/CVERecord?id=CVE-2026-71326
- https://github.com/advisories/GHSA-6765-c87h-8mrf
- https://osv.dev/vulnerability/MINI-j9fm-fh53-7w2f
- https://osv.dev/vulnerability/CVE-2026-71326
- https://github.com/traefik/traefik/commit/b5ace8eb5d6779980567f5e75efd2d9e08b7e350
- https://github.com/traefik/traefik/pull/13572
- https://github.com/traefik/traefik/releases/tag/v3.6.25
- https://github.com/traefik/traefik/releases/tag/v3.7.10
- https://github.com/traefik/traefik/security/advisories/GHSA-6765-c87h-8mrf