Not Failing Securely ('Failing Open') Affecting openclaw package, versions <2026.5.6-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.19% (9th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-OPENCLAW-17351351
  • published17 Jun 2026
  • disclosed12 Jun 2026

Introduced: 12 Jun 2026

NewCVE-2026-53837  (opens in a new tab)
CWE-636  (opens in a new tab)

How to fix?

Upgrade Minimos:latest openclaw to version 2026.5.6-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openclaw package and not the openclaw package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

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 Base Scores

version 3.1