CVE-2026-85597
Critical · CVSS 9.1- CVSS
- 9.1
- nvd
- EPSS
- 0.35%
- 27th pct
- KEV
- No
- Class
- oss containerizable
- CWE-863
Description
Traefik before v2.11.55 and v3.0.0 through v3.7.10 contain a TLS option conflict resolution vulnerability that allows unauthenticated attackers to bypass client-certificate authentication by creating conflicting TLS options on multi-host routers. Attackers can reach protected backends by exploiting shared TLS resolution across multiple hostnames in a single router rule, causing the strict mTLS requirement to fall back to default options for all hosts.
References
Status: profiled · ingested 2026-10-08T18:00:43.000Z