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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Openclaw Openclaw
cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*
|
— |
2026.2.26
|
References 3
https://github.com/openclaw/openclaw/commit/3d30ba18a2aba1e1b302e77ff33145c3b06…
disclosure@vulncheck.com
https://github.com/openclaw/openclaw/security/advisories/GHSA-v8cg-4474-49v8
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/openclaw-sender-authorization-bypass-in-sl…
disclosure@vulncheck.com