CVE-2026-35646CWE-307

OpenClaw < 2026.3.25 - Pre-Authentication Rate-Limit Bypass in Webhook Token Validation

Medium · published April 9, 2026

CVSS v4.0
6.3
EPSS
0%
Percentile
35.2
In the wild
Unconfirmed
What it is

OpenClaw before 2026.3.25 contains a pre-authentication rate-limit bypass vulnerability in webhook token validation that allows attackers to brute-force weak webhook secrets. The vulnerability exists because invalid webhook tokens are rejected without throttling repeated authentication attempts, enabling attackers to guess weak tokens through rapid successive requests.

The record
Technical detail
CVSS v4.0
6.3 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.00420 · 35.2th percentile
Weakness
CWE-307 · Improper Restriction of Excessive Authentication Attempts
Published
2026-04-09T21:27Z
EPSS history
Timeline
  • 09 APR 21:27Z
    OpenClaw < 2026.3.25 - Pre-Authentication Rate-Limit Bypass in Webhook Token Validation
    cvelistv5