HTTP client can manipulate custom HTTP headers that are added by Traefik

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

9.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N · score source

EPSS

• CVE-2024-45410: 1.51% estimated exploitation activity in the next 30 days; percentile 74.51 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Impact There is a vulnerability in Traefik that allows the client to remove the X-Forwarded headers (except the header X-Forwarded-For). Patches - https://github.com/traefik/traefik/releases/tag/v2.11.9 - https://github.com/traefik/traefik/releases/tag/v3.1.3 Workarounds No workaround. For more information If you have any questions or comments about this advisory, please open an issue. <details <summaryOriginal Description</summary Summary When a HTTP request is processed by Traefik, certain HTTP headers such as X-Forwarded-Host or X-Forwarded-Port are added by Traefik before the request is routed to the application. For a HTTP client, it should not be possible to remove or modify these headers. Since the application trusts the value of these headers, security implications might arise, if they can be modified. For HTTP/1.1, however, it was found that some of theses custom headers can indeed be removed and in certain cases manipulated. The attack relies on the HTTP/1.1 behavior, that…

Published by the source

19 Sep 2024, 14:48 UTC

Last modified by the source

25 Sep 2024, 19:29 UTC

Source last checked

26 Oct 2026, 15:05 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-62c8-mh53-4cqv

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# Patch Next advisory brief: CVE-2024-45410

Advisory: HTTP client can manipulate custom HTTP headers that are added by Traefik
IDs: CVE-2024-45410, GHSA-62c8-mh53-4cqv
Record: https://patchnext.com/advisories/cve-2024-45410 (revision 1, source checked 26 Oct 2026, 15:05 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/traefik/traefik/v3 3.1.3; github.com/traefik/traefik/v2 2.11.9; github.com/traefik/traefik 2.11.9. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/traefik/traefik/v3: affected >= 3.0.0-beta3, < 3.1.3; fixed in 3.1.3
- Go github.com/traefik/traefik/v2: affected < 2.11.9; fixed in 2.11.9
- Go github.com/traefik/traefik: affected < 2.11.9; fixed in 2.11.9

## Suggested inspection (read-only)
- Go github.com/traefik/traefik/v3: check the installed version with your package manager.
- Go github.com/traefik/traefik/v2: check the installed version with your package manager.
- Go github.com/traefik/traefik: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/traefik/traefik/v3, github.com/traefik/traefik/v2, github.com/traefik/traefik.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-62c8-mh53-4cqv (GitHub-reviewed advisory GHSA-62c8-mh53-4cqv lists affected ranges: Go github.com/traefik/traefik/v3 >=3.0.0-beta3 =0 =0 <2.11.9)

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