Description
Traefik is an HTTP reverse proxy and load balancer. Versions prior to 2.11.6, 3.0.4, and 3.1.0-rc3 have a vulnerability that allows bypassing IP allow-lists via HTTP/3 early data requests in QUIC 0-RTT handshakes sent with spoofed IP addresses. Versions 2.11.6, 3.0.4, and 3.1.0-rc3 contain a patch for this issue. No known workarounds are available.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| traefik | traefik | < 2.11.6, >= 3.0.0-beta3, < 3.0.4, >= 3.1.0-rc1, < 3.1.0-rc3 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | traefik | 3.0.4-2.1 | openSUSE-SU-2024:14181-1 |
| openSUSE Tumbleweed | traefik2 | 2.11.6-2.1 | openSUSE-SU-2024:14182-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/traefik/traefik | all versions | — | GO-2024-2973 |
| Go | github.com/traefik/traefik/v2 | < 2.11.6 | 2.11.6 | GHSA-gxrv-wf35-62w9 |
| Go | github.com/traefik/traefik/v3 | >= 3.0.0-beta3, < 3.0.4 | 3.0.4 | GHSA-gxrv-wf35-62w9 |
| Go | github.com/traefik/traefik/v3 | >= 3.1.0-rc1, < 3.1.0-rc3 | 3.1.0-rc3 | GHSA-gxrv-wf35-62w9 |
| Go | github.com/traefik/traefik/v3 | >= 3.0.0-beta3, < 3.0.4 · >= 3.1.0-rc1, < 3.1.0-rc3 | 3.0.4, 3.1.0-rc3 | GO-2024-2973 |
Advisories 2
- openSUSE-SU-2024:14182-1 traefik2-2.11.6-2.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14181-1 traefik-3.0.4-2.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026