> CVE-2026-53837 [MEDIUM]

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PUBLISHED
2026-06-12 22:16
MODIFIED
2026-06-12 22:16
CVSS_SCORE V3
6.3
EPSS (Prob. Exploit)
0.19%
Top 91.5%
DATA SOURCES:
NVD 🔗 2026-06-12 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-11-01 GITHUB 🔗 2026-11-05 OSV 🔗 2026-11-02

> DESCRIPTION

OpenClaw before 2026.5.6 contains an improper access control vulnerability in Mattermost event handlers that fails to validate channel type metadata. Attackers can bypass intended DM policy decisions by sending crafted Mattermost events missing channel type information to process restricted content.

> 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:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/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:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/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
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
High (H)
Conditions spécifiques doivent être réunies pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
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
None (N)
Aucune divulgation 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
None
Aucune divulgation d'informations
Intégrité
Low
Modification limitée des données possible
Disponibilité
None
Aucune interruption de service

> WEAKNESSES

CWE-636

> CWE DETAILED DESCRIPTIONS

CWE-636: Not Failing Securely - When the product encounters an error condition or failure, its design requires it to fall back to a state that is less secure than other options that are available, such as selecting the weakest encryption algorithm or using the most permissive access control restrictions.

> GITHUB SECURITY ADVISORY

GHSA-gp79-m99v-gjmh MODERATE

OpenClaw: Mattermost handlers could fall open when channel type was missing

AFFECTED PACKAGES:
NPM / openclaw
<= 2026.5.5
Fixed in: 2026.5.6

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

OpenClaw < 2026.5.6 - Missing Channel Type Validation in Mattermost Event Handlers

AFFECTED PACKAGES:
Unknown / Unknown
118 versions affected
ALIASES:
GHSA-gp79-m99v-gjmh

> HISTORIQUE DES MODIFICATIONS

Première apparition
12/06/2026 22:16
Source: NVD
📊 ENRICHISSEMENT 01/11/2026 06:59
CWE
Champ modifié: Description CWE
Ancienne valeur:
CWE-636: Not Failing Securely ('Failing Open') - When the product encounters an error condition or failure, its design requires it to fall back to a state that is less secure than other options that a...
Nouvelle valeur:
CWE-636: Not Failing Securely - When the product encounters an error condition or failure, its design requires it to fall back to a state that is less secure than other options that are available, suc...
📊 ENRICHISSEMENT 01/07/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-636: Not Failing Securely ('Failing Open') - When the product encounters an error condition or failure, its design requires it to fall back to a state that is less secure than other options that a...
Total des modifications: 2 Dernière mise à jour: 6 days ago

> REFERENCES

https://github.com/openclaw/openclaw/security/advisories/GHSA-gp79-m99v-gjmh
https://www.vulncheck.com/advisories/openclaw-missing-channel-type-validation-in...
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