---
id: CVE-2026-71325
title: >-
  Traefik is an open-source edge router that makes publishing services a fun and
  easy experience
summary: >-
  Traefik is an open-source edge router that makes publishing services a fun and
  easy experience. Prior to 2.11.54, 3.6.25, and 3.7.10, cross-namespace
  @kubernetescrd references are not rejected for TraefikService backend
  references resolv…
severity: medium
cvss: 4.4
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-653
  - CWE-863
vendor: traefik
product: traefik
affected:
  - traefik < 2.11.54
  - 'traefik >= 3.0.0, < 3.6.25'
  - 'traefik >= 3.7.0, <= 3.7.10'
patched:
  - traefik 3.6.25
published: '2026-08-06'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T20:46:01.890'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-71325'
references:
  - url: >-
      https://github.com/traefik/traefik/commit/65ebf4b47fbdc33e3856803a5844a404e094d52d
    label: security-advisories@github.com
  - url: 'https://github.com/traefik/traefik/releases/tag/v2.11.54'
    label: security-advisories@github.com
  - url: 'https://github.com/traefik/traefik/releases/tag/v3.6.25'
    label: security-advisories@github.com
  - url: 'https://github.com/traefik/traefik/releases/tag/v3.7.10'
    label: security-advisories@github.com
  - url: 'https://github.com/traefik/traefik/security/advisories/GHSA-62fc-8686-hfmq'
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-62fc-8686-hfmq'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-71325.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-71325'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2512238'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-71325'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-71325'
tags:
  - nvd
  - ghsa
  - go
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.00155
epssPercentile: 0.0395
aliases:
  - GHSA-62fc-8686-hfmq
ecosystem: go
ingestedAt: '2026-08-06T17:00:12.775Z'
scores:
  nvd: 4.4
  vendor: 8.7
---

## Overview

Traefik is an open-source edge router that makes publishing services a fun and easy experience. Prior to 2.11.54, 3.6.25, and 3.7.10, cross-namespace @kubernetescrd references are not rejected for TraefikService backend references resolved by the service resolver. A tenant confined by RBAC to a single namespace can therefore bind its own router to a TraefikService owned by another namespace and expose or reroute that namespace's backend, defeating the namespace isolation allowCrossNamespace=false is meant to enforce. This issue is fixed in version 2.11.54, 3.6.25, 3.7.10.

## Affected

- `traefik < 2.11.54`
- `traefik >= 3.0.0, < 3.6.25`
- `traefik >= 3.7.0, <= 3.7.10`

## Remediation

Upgrade past the affected range:

- `traefik 3.6.25`

## Package advisory (CVE-2026-71325)

Affected packages:

- `github.com/traefik/traefik/v2 <= 2.11.53`
- `github.com/traefik/traefik/v3 >= 3.0.0, <= 3.6.24`
- `github.com/traefik/traefik/v3 >= 3.7.0, <= 3.7.9`
- `github.com/traefik/traefik <= 1.7.34`

Patched in:

- `github.com/traefik/traefik/v2 2.11.54`
- `github.com/traefik/traefik/v3 3.6.25`
- `github.com/traefik/traefik/v3 3.7.10`

Source: https://github.com/advisories/GHSA-62fc-8686-hfmq

## Vendor advisories

- **Red Hat VEX** · Important · affected: Red Hat OpenShift Dev Spaces · no fix planned: Red Hat OpenShift Dev Spaces · updated 2026-09-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-71325.json)