GHSA-6mxq-jr92-3h2r

Source

https://github.com/advisories/GHSA-6mxq-jr92-3h2r

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-6mxq-jr92-3h2r/GHSA-6mxq-jr92-3h2r.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-6mxq-jr92-3h2r

Withdrawn

2026-08-05T21:49:07Z

Published

2026-07-22T12:32:18Z

Modified

2026-08-05T22:01:01Z

Severity

5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator

Summary

Duplicate Advisory: Traefik Gateway API HTTPRoute BackendRef ExtensionRef Namespace Confusion

Details

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-qq9q-x9w4-chhj. This link is maintained to preserve external references.

Original Description

Traefik versions 3.7.0 through 3.7.6 contain a namespace confusion vulnerability in the Kubernetes Gateway API provider. When resolving HTTPRoute.spec.rules[].backendRefs[].filters[].extensionRef, Traefik used the backend Service namespace instead of the HTTPRoute namespace. A low-privileged route author holding a ReferenceGrant for a cross-namespace Service could therefore bind a Traefik Middleware from the backend namespace without a separate grant for that middleware, potentially injecting trusted reverse-proxy identity headers into downstream requests. The issue is fixed in version 3.7.7.

Database specific

{
    "cwe_ids":  [
        "CWE-863"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-08-05T21:49:07Z",
    "nvd_published_at":  "2026-07-22T12:18:20Z",
    "severity":  "MODERATE"
}

References

Affected packages

Go / github.com/traefik/traefik

Package

Name: github.com/traefik/traefik; View open source insights on deps.dev
Purl: pkg:golang/github.com/traefik/traefik

Affected ranges

Type: SEMVER
Events: Introduced

3.7.0

Database specific

last_known_affected_version_range

"< 3.7.7"

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-6mxq-jr92-3h2r/GHSA-6mxq-jr92-3h2r.json"