Staging Environment: Content and features may be unstable or change without notice.
Advisory details: gitlab / npm/openclaw/GHSA-gp79-m99v-gjmh
Advisory ID gitlab/npm/openclaw/GHSA-gp79-m99v-gjmh
Aliases CVE-2026-53837
GHSA-gp79-m99v-gjmh
Summary OpenClaw: Mattermost handlers could fall open when channel type was missing Mattermost handlers could fall open when channel type was missing. In affected versions, a Mattermost event missing channel type metadata could continue without applying the intended DM policy decision. This advisory is scoped to the named feature and configuration. It does not change OpenClaw's trusted-operator model: authenticated Gateway operators, installed plugins, and intentional local execution surfaces remain trusted unless a separate policy, approval, allowlist, sandbox, or auth boundary is crossed.
Status Published
Exploitability 0.5
Weighted Severity 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (3)
CWE-636 Not Failing Securely ('Failing Open')
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3.1 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/npm/openclaw/GHSA-gp79-m99v-gjmh.yml
Reference id Reference type URL
https://github.com/openclaw/openclaw/security/advisories/GHSA-gp79-m99v-gjmh
https://www.vulncheck.com/advisories/openclaw-missing-channel-type-validation-in-mattermost-event-handlers
CVE-2026-53837 https://nvd.nist.gov/vuln/detail/CVE-2026-53837
GHSA-gp79-m99v-gjmh https://github.com/advisories/GHSA-gp79-m99v-gjmh
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N Found at https://gitlab.com/gitlab-org/advisories-community/-/blob/main/npm/openclaw/GHSA-gp79-m99v-gjmh.yml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-06-15T15:09:52Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/53xxx/CVE-2026-53837.json

Source Advisory: vulnrichment/CVE-2026-53837

View SSVC decision tree 
[{'Exploitation': 'none'},
 {'Automatable': 'no'},
 {'Technical Impact': 'partial'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]