CVE-2026-22045
Fixed in a distro release EPSS <1%CVSS 5.9
Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.35 and 3.6.7, there is a potential vulnerability in Traefik ACME TLS certificates' automatic generation: the ACME TLS-ALPN fast path can allow unauthenticated clients to tie up go routines and file descriptors indefinitely when the ACME TLS challenge is enabled. A malicious client can open many connections, send a minimal ClientHello with acme-tls/1, then stop responding, leading to denial of service of the entry point. The vulnerability is fixed in 2.11.35 and 3.6.7.
Products: traefik
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| Go | github.com/traefik/traefik | no fix |
| Go | github.com/traefik/traefik/v2 | 2.11.35 |
| Go | github.com/traefik/traefik/v3 | 3.6.7 |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Chainguard | traefik-3.4 | no fix |
| Chainguard | traefik-3.5 | no fix |
| Chainguard | traefik-3.5 | 3.5.6-r6 |
| Chainguard | traefik-fips-3.5 | no fix |
| Wolfi | traefik-3.4 | no fix |
| Wolfi | traefik-3.5 | 3.5.6-r6 |
| openSUSE Leap 15.6 | govulncheck-vulndb | 0.0.20260123T022811-150000.1.140.1 |
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260723T184607-160000.1.1 |
| openSUSE Tumbleweed | traefik | 3.6.7-1.1 |
| openSUSE Tumbleweed | traefik2 | 2.11.35-1.1 |