> CVE-2026-71325 [MEDIUM]

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PUBLISHED
2026-08-06 22:18
MODIFIED
2026-08-06 22:18
CVSS_SCORE V3
4.8
EPSS (Prob. Exploit)
0.16%
Top 95.7%
DATA SOURCES:
NVD đź”— 2026-08-06 CWE MITRE đź”— 2026-11-01 FIRST EPSS đź”— 2026-10-25 GITHUB đź”— 2026-10-29 OSV đź”— 2026-08-13

> DESCRIPTION

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_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/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

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/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
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Local (L)
Exploit nécessite un accès local au système
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
Low (L)
Authentifié avec compte utilisateur basique
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
Low (L)
Divulgation limitée d'informations
I (Impact Intégrité)
Integrity Impact
Low (L)
Modification limitée des données possible
A (Impact Disponibilité)
Availability Impact
None (N)
Aucune interruption de service

> RÉSUMÉ DES IMPACTS

Confidentialité
Low
Divulgation limitée d'informations
Intégrité
Low
Modification limitée des données possible
Disponibilité
None
Aucune interruption de service

> WEAKNESSES

CWE-653 CWE-863

> CWE DETAILED DESCRIPTIONS

CWE-653: Improper Isolation or Compartmentalization - The product does not properly compartmentalize or isolate functionality, processes, or resources that require different privilege levels, rights, or permissions. | CWE-863: Incorrect Authorization - The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: Red Hat OpenShift Dev Spaces 3.31.0 Release.
Red Hat OpenShift Dev Spaces 3.31.0 has been released.

> GITHUB SECURITY ADVISORY

GHSA-62fc-8686-hfmq MODERATE

Traefik: `allowCrossNamespace=false` bypass via `@kubernetescrd` TraefikService backendRef

AFFECTED PACKAGES:
GO / github.com/traefik/traefik
<= 1.7.34
GO / github.com/traefik/traefik/v3
>= 3.7.0, <= 3.7.9
Fixed in: 3.7.10
GO / github.com/traefik/traefik/v3
>= 3.0.0, <= 3.6.24
Fixed in: 3.6.25
GO / github.com/traefik/traefik/v2
<= 2.11.53
Fixed in: 2.11.54

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Traefik: `allowCrossNamespace=false` bypass via `@kubernetescrd` TraefikService backendRef

AFFECTED PACKAGES:
Unknown / Unknown
315 versions affected
ALIASES:
GHSA-62fc-8686-hfmq

> HISTORIQUE DES MODIFICATIONS

Première apparition
06/08/2026 22:18
Source: NVD
📊 ENRICHISSEMENT 01/09/2026 06:02
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-653: Improper Isolation or Compartmentalization - The product does not properly compartmentalize or isolate functionality, processes, or resources that require different privilege levels, rights, ...
Total des modifications: 1 Dernière mise à jour: 2 months ago

> REFERENCES

https://github.com/traefik/traefik/commit/65ebf4b47fbdc33e3856803a5844a404e094d5...
https://github.com/traefik/traefik/releases/tag/v2.11.54
https://github.com/traefik/traefik/releases/tag/v3.6.25
https://github.com/traefik/traefik/releases/tag/v3.7.10
https://github.com/traefik/traefik/security/advisories/GHSA-62fc-8686-hfmq
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