CVE-2026-35665CWE-405

OpenClaw < 2026.3.24 - Denial of Service via Feishu Webhook Pre-Auth Body Parsing

Medium · published April 10, 2026

CVSS v4.0
6.9
EPSS
0%
Percentile
38.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.9 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
EPSS
0.00456 · 38.6th percentile
Weakness
CWE-405 · Asymmetric Resource Consumption (Amplification)
Published
2026-04-10T16:03Z
EPSS history
Timeline
  • 10 APR 16:03Z
    OpenClaw < 2026.3.24 - Denial of Service via Feishu Webhook Pre-Auth Body Parsing
    cvelistv5