OpenClaw before 2026.3.24 contains an incomplete fix for CVE-2026-32011 where the Feishu webhook handler accepts request bodies with permissive limits of 1MB and 30-second timeo...
Date: 2026-04
Affected: openclaw/openclaw
Attack vector: dos
Category: vulnerability-disclosure
Severity: High
CVE: CVE-2026-32011
CVE-2026-35665
CWE: CWE-405
CWE-770
CVSS: 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

OpenClaw before 2026.3.24 contains an incomplete fix for CVE-2026-32011 where the Feishu webhook handler accepts request bodies with permissive limits of 1MB and 30-second timeout before signature verification. An unauthenticated attacker can exhaust server connection resources by sending concurrent slow HTTP POST requests to the Feishu webhook endpoint, blocking legitimate webhook deliveries.


Mitigations:

Architectural layers (MAESTRO):