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.
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* < 2.11.55cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* ≥ 3.0.0 < 3.7.11Our free, open-source honeypot sensor waits on ports your server does not use and reports the scanners and attackers that connect to a shared blocklist.