EUVD-2026-13970
GHSA-xgwg-m42c-8q62
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Lifecycle Timeline
5Description
OpenClaw versions prior to 2026.2.26 fail to enforce sender authorization in member and message subtype system event handlers, allowing unauthorized events to be enqueued. Attackers can bypass Slack DM allowlists and per-channel user allowlists by sending system events from non-allowlisted senders through message_changed, message_deleted, and thread_broadcast events.
Analysis
OpenClaw versions prior to 2026.2.26 contain an authentication bypass vulnerability in their Slack system event handlers that fails to properly enforce sender authorization checks. Attackers with low-privilege access (PR:L in CVSS vector) can craft and send unauthorized system events through message_changed, message_deleted, and thread_broadcast event types to bypass Slack DM allowlists and per-channel user allowlists. …
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Remediation
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Vendor patch is available.
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External POC / Exploit Code
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