OpenClaw before 2026.3.28 downloads and stores inbound media from Zalo channels before validating sender authorization.
Date: 2026-03
Affected: openclaw/openclaw
Attack vector: auth-bypass
Category: vulnerability-disclosure
Severity: Medium
CVE: CVE-2026-33576
CWE: CWE-863
CVSS: 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L)

OpenClaw before 2026.3.28 downloads and stores inbound media from Zalo channels before validating sender authorization. Unauthorized senders can force network fetches and disk writes to the media store by sending messages that are subsequently rejected.


Mitigations:

Architectural layers (MAESTRO):