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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenClaw | OpenClaw | < 2026.2.26 | 2026.2.26 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | openclaw | < 2026.2.26 | 2026.2.26 | GHSA-v8cg-4474-49v8 |
Advisories 1
- WID-SEC-2026-0551 OpenClaw: Mehrere Schwachstellen BSI CERT-Bund (WID) · Mar 24, 2026
References
- GitHub Security Advisory (GHSA-v8cg-4474-49v8) vendor-advisory
- Patch Commit patch
- VulnCheck Advisory: OpenClaw < 2026.2.26 - Sender Authorization Bypass in Slack System Event Handlers third-party-advisory