Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenClaw | OpenClaw | < 2026.5.6 | 2026.5.6 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | openclaw | < 2026.5.6 | 2026.5.6 | GHSA-gp79-m99v-gjmh |
Advisories 1
- WID-SEC-2026-1738 OpenClaw: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 16, 2026
References
- GitHub Security Advisory (GHSA-gp79-m99v-gjmh) vendor-advisory
- VulnCheck Advisory: OpenClaw < 2026.5.6 - Missing Channel Type Validation in Mattermost Event Handlers third-party-advisory