Description
Traefik is an HTTP reverse proxy and load balancer. Versions 2.11.40 and below, 3.0.0-beta1 through 3.6.11, and 3.7.0-ea.1 are vulnerable to mTLS bypass through the TLS SNI pre-sniffing logic related to fragmented ClientHello packets. When a TLS ClientHello is fragmented across multiple records, Traefik's SNI extraction may fail with an EOF and return an empty SNI. The TCP router then falls back to the default TLS configuration, which does not require client certificates by default. This allows an attacker to bypass route-level mTLS enforcement and access services that should require mutual TLS authentication. This issue is patched in versions 2.11.41, 3.6.11 and 3.7.0-ea.2.
INFO
Published Date :
2026-03-20T10:01:13.620Z
Last Modified :
2026-03-20T13:45:04.503Z
Source :
GitHub_M
AFFECTED PRODUCTS
The following products are affected by CVE-2026-32305 vulnerability.
| Vendors | Products |
|---|---|
| Traefik |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-32305.
