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CVE Vulnerability Details :
CVE-2026-53837
PUBLISHED
More InfoOfficial Page
Assigner-VulnCheck
Assigner Org ID-83251b91-4cc7-4094-a5c7-464a1b83ea10
View Known Exploited Vulnerability (KEV) details
Published At-12 Jun, 2026 | 21:57
Updated At-12 Jun, 2026 | 21:57
Rejected At-
▼CVE Numbering Authority (CNA)
OpenClaw < 2026.5.6 - Missing Channel Type Validation in Mattermost Event Handlers

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
Vendor
OpenClawOpenClaw
Product
OpenClaw
Repo
https://github.com/openclaw/openclaw
Default Status
unaffected
Versions
Affected
  • From 0 before 2026.5.6 (semver)
Unaffected
  • 2026.5.6 (semver)
Problem Types
TypeCWE IDDescription
CWECWE-636Not Failing Securely ('Failing Open')
Type: CWE
CWE ID: CWE-636
Description: Not Failing Securely ('Failing Open')
Metrics
VersionBase scoreBase severityVector
4.06.3MEDIUM
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
3.13.7LOW
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Version: 4.0
Base score: 6.3
Base severity: MEDIUM
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
Version: 3.1
Base score: 3.7
Base severity: LOW
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
reporter
zsx (@zsxsoft)
coordinator
KeenSecurityLab
tool
qclawer
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/openclaw/openclaw/security/advisories/GHSA-gp79-m99v-gjmh
vendor-advisory
https://www.vulncheck.com/advisories/openclaw-missing-channel-type-validation-in-mattermost-event-handlers
third-party-advisory
Hyperlink: https://github.com/openclaw/openclaw/security/advisories/GHSA-gp79-m99v-gjmh
Resource:
vendor-advisory
Hyperlink: https://www.vulncheck.com/advisories/openclaw-missing-channel-type-validation-in-mattermost-event-handlers
Resource:
third-party-advisory
Details not found