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CVE-2026-53837

CVE-2026-53837 · OpenClaw < 2026.5.6 - Missing Channel Type Validation in Mattermost Event Handlers

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 6.3 · Medium · EPSS 0.3% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • openclaw

    Versions
    • ≥ 0, < 2026.5.6: Affected (semver)
    • 2026.5.6: Not affected (semver)

    Update to 2026.5.6

  • openclaw npm

    Affected ranges
    • SEMVER: < 2026.5.6

    Update to 2026.5.6

Original sources

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