Insecure Default Initialization of Resource Affecting github.com/traefik/traefik/v2/pkg/server/router/tcp package, versions <2.11.41
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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-GOLANG-GITHUBCOMTRAEFIKTRAEFIKV2PKGSERVERROUTERTCP-15702044
- published20 Mar 2026
- disclosed20 Mar 2026
- creditInfinityHub123
Introduced: 20 Mar 2026
CVE-2026-32305 Â (opens in a new tab)How to fix?
Upgrade github.com/traefik/traefik/v2/pkg/server/router/tcp to version 2.11.41 or higher.
Overview
github.com/traefik/traefik/v2/pkg/server/router/tcp is a modern HTTP reverse proxy and load balancer that makes deploying microservices easy. Traefik integrates with your existing infrastructure components (Docker, Swarm mode, Kubernetes, Marathon, Consul, Etcd, Rancher, Amazon ECS, ...) and configures itself automatically and dynamically. Pointing Traefik at your orchestrator should be the only configuration step you need.
Affected versions of this package are vulnerable to Insecure Default Initialization of Resource in the SNI extraction when handling fragmented TLS ClientHello packets. An attacker can gain unauthorized access to services protected by mutual TLS by sending a fragmented ClientHello, causing the system to fall back to a default configuration that does not enforce client certificate authentication.