> CVE-2026-56742 [MEDIUM]

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PUBLISHED
2026-07-15 20:17
MODIFIED
2026-07-15 20:54
CVSS_SCORE V3
5.9
EPSS (Prob. Exploit)
0.17%
Top 93.7%
DATA SOURCES:
NVD đź”— 2026-07-15 CWE MITRE đź”— 2026-11-01 FIRST EPSS đź”— 2026-10-25 GITHUB đź”— 2026-11-05 OSV đź”— 2026-11-02

> DESCRIPTION

Cilium is a networking, observability, and security solution. Prior to 1.17.17, 1.18.11, and 1.19.5, Cilium clusters using Gateway API allow users with permissions to create or update namespaced HTTPRoutes to mirror HTTP traffic to any Service in any namespace, bypassing the ReferenceGrant authorization mechanism. Gateway API functionality is disabled by default. This issue is fixed in versions 1.17.17, 1.18.11, and 1.19.5.

> AFFECTED_PRODUCTS

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

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L
EXPLOITABILITY
1.7
IMPACT
3.7

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Adjacent (A)
Exploit nécessite un accès au segment réseau local
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
High (H)
Authentifié avec privilèges administratifs
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Changed (C)
Impact s'étend au-delà 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
Low (L)
Interruption partielle du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
Low
Divulgation limitée d'informations
Intégrité
Low
Modification limitée des données possible
Disponibilité
Low
Interruption partielle du service possible

> WEAKNESSES

CWE-862

> CWE DETAILED DESCRIPTIONS

CWE-862: Missing Authorization - The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

> GITHUB SECURITY ADVISORY

GHSA-w7c2-w76w-5hmj MODERATE

Cilium: Namespaced HTTPRoutes can redirect traffic to other namespaces

AFFECTED PACKAGES:
GO / github.com/cilium/cilium
>= 1.19.0, < 1.19.5
Fixed in: 1.19.5
GO / github.com/cilium/ciliumCilium
>= 1.18.0, < 1.18.11
Fixed in: 1.18.11
GO / github.com/cilium/cilium
< 1.17.17
Fixed in: 1.17.17

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Cilium: Namespaced HTTPRoutes can redirect traffic to other namespaces

AFFECTED PACKAGES:
Unknown / Unknown
204 versions affected
ALIASES:
BIT-cilium-2026-56742, BIT-cilium-operator-2026-56742, BIT-hubble-relay-2026-56742, GHSA-w7c2-w76w-5hmj, GO-2026-6596

> HISTORIQUE DES MODIFICATIONS

Première apparition
15/07/2026 20:17
Source: NVD
📊 ENRICHISSEMENT 01/08/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-862: Missing Authorization - The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
Total des modifications: 1 Dernière mise à jour: 3 months ago

> REFERENCES

https://github.com/cilium/cilium/commit/7422068aff67ac77c7dcc57aa5b9240c91333deb
https://github.com/cilium/cilium/commit/e0b1cef513ff910323f3743e9f3e3d86721e4857
https://github.com/cilium/cilium/commit/f23929cff682d6ed0dc158070812cb302fc0032b
https://github.com/cilium/cilium/commit/fd47963ea394d5e8fa4a88c40a79063430c512ca
https://github.com/cilium/cilium/releases/tag/v1.17.17
https://github.com/cilium/cilium/releases/tag/v1.18.11
https://github.com/cilium/cilium/releases/tag/v1.19.5
https://github.com/cilium/cilium/security/advisories/GHSA-w7c2-w76w-5hmj
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