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5.3
Slack's OpenClaw Fails to Authenticate System Event Senders, Allows Unauthorized Messages
CVE-2026-32895
Summary
OpenClaw, a Slack app, has a security issue that allows unauthorized users to send messages to direct messages and channels through system events. This means that attackers can bypass the usual security checks and send unwanted messages. To fix this, update to OpenClaw version 2026.2.26 or later.
Original title
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 Slac...
Original description
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.
nvd CVSS3.1
5.4
nvd CVSS4.0
5.3
Vulnerability type
CWE-863
Incorrect Authorization
Published: 21 Mar 2026 · Updated: 21 Mar 2026 · First seen: 21 Mar 2026