PT-2026-31976 · Openclaw · Openclaw

Published 2026-04-10 · Updated 2026-04-10 · CVE-2026-35665

NVD

CVSS v3.1

5.3

Medium

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.

Fix

Weakness Enumeration

CWE-405

Related Identifiers

CVE-2026-35665

Affected Products

Openclaw

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-35665 · Security Note
• https://vulncheck.com/advisories/openclaw-denial-of-service-via-feishu-webhook-pre-auth-body-parsing · Note
• https://github.com/openclaw/openclaw/security/advisories/GHSA-w6m8-cqvj-pg5v · Note