> CVE-2026-40923 [MEDIUM]

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PUBLISHED
2026-04-21 21:16
MODIFIED
2026-04-21 21:16
CVSS_SCORE V3
5.4
EPSS (Prob. Exploit)
0.22%
Top 87.4%
DATA SOURCES:
NVD 🔗 2026-04-21 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-11-08 GITHUB 🔗 2026-11-05 OSV 🔗 2026-10-18

> DESCRIPTION

Tekton Pipelines project provides k8s-style resources for declaring CI/CD-style pipelines. Prior to 1.11.1, a validation bypass in the VolumeMount path restriction allows mounting volumes under restricted /tekton/ internal paths by using .. path traversal components. The restriction check uses strings.HasPrefix without filepath.Clean, so a path like /tekton/home/../results passes validation but resolves to /tekton/results at runtime. This vulnerability is fixed in 1.11.1.

> 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:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
EXPLOITABILITY
2.8
IMPACT
2.5

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
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-22

> CWE DETAILED DESCRIPTIONS

CWE-22: Improper Limitation of a Pathname to a Restricted Directory - The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

> GITHUB SECURITY ADVISORY

GHSA-rx35-6rhx-7858 MODERATE

Tekton Pipelines: VolumeMount path restriction bypass via missing filepath.Clean in /tekton/ check

AFFECTED PACKAGES:
GO / github.com/tektoncd/pipeline
>= 1.0.0, < 1.0.2
Fixed in: 1.0.2
GO / github.com/tektoncd/pipeline
>= 1.2.0, < 1.3.4
Fixed in: 1.3.4
GO / github.com/tektoncd/pipeline
>= 1.4.0, < 1.6.2
Fixed in: 1.6.2
GO / github.com/tektoncd/pipeline
>= 1.7.0, < 1.9.3
Fixed in: 1.9.3
GO / github.com/tektoncd/pipeline
>= 1.10.0, < 1.11.1
Fixed in: 1.11.1

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Tekton Pipelines: VolumeMount path restriction bypass via missing filepath.Clean in /tekton/ check

AFFECTED PACKAGES:
Unknown / Unknown
17 versions affected
ALIASES:
GHSA-rx35-6rhx-7858, GO-2026-5643

> HISTORIQUE DES MODIFICATIONS

Première apparition
21/04/2026 21:16
Source: NVD
📊 ENRICHISSEMENT 01/11/2026 06:59
CWE
Champ modifié: Description CWE
Ancienne valeur:
CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') - The product uses external input to construct a pathname that is intended to identify a file or directory that i...
Nouvelle valeur:
CWE-22: Improper Limitation of a Pathname to a Restricted Directory - The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneat...
📊 ENRICHISSEMENT 01/05/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') - The product uses external input to construct a pathname that is intended to identify a file or directory that i...
Total des modifications: 2 Dernière mise à jour: 1 week ago

> REFERENCES

https://github.com/tektoncd/pipeline/releases/tag/v1.11.1
https://github.com/tektoncd/pipeline/security/advisories/GHSA-rx35-6rhx-7858
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