Description
Traefik is an HTTP reverse proxy and load balancer. In affected versions sending a GET request to any Traefik endpoint with the "Content-length" request header results in an indefinite hang with the default configuration. This vulnerability can be exploited by attackers to induce a denial of service. This vulnerability has been addressed in version 2.11.2 and 3.0.0-rc5. Users are advised to upgrade. For affected versions, this vulnerability can be mitigated by configuring the readTimeout option.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| traefik | traefik | < 2.11.2, >= 3.0.0-rc1, < 3.0.0-rc5 | — |
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 | 2.11.2-1.1 | openSUSE-SU-2024:13927-1 |
| openSUSE Tumbleweed | traefik2 | 2.11.5-1.1 | openSUSE-SU-2024:14076-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/traefik/traefik | < 2.11.2 | 2.11.2 | GHSA-4vwx-54mw-vqfw |
| Go | github.com/traefik/traefik | all versions | — | GO-2024-2722 |
| Go | github.com/traefik/traefik/v2 | < 2.11.2 | 2.11.2 | GHSA-4vwx-54mw-vqfw |
| Go | github.com/traefik/traefik/v3 | >= 3.0.0-beta3, < 3.0.0-rc5 | 3.0.0-rc5 | GHSA-4vwx-54mw-vqfw |
Advisories 2
- openSUSE-SU-2024:14076-1 traefik2-2.11.5-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13927-1 traefik-2.11.2-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://github.com/traefik/traefik/security/advisories/GHSA-4vwx-54mw-vqfw
- https://github.com/traefik/traefik/commit/240b83b77351dfd8cadb91c305b84e9d22e0f9c6
- https://doc.traefik.io/traefik/routing/entrypoints/#respondingtimeouts
- https://github.com/traefik/traefik/releases/tag/v2.11.2
- https://github.com/traefik/traefik/releases/tag/v3.0.0-rc5