CVE-2026-35646

MEDIUM

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

Title source: cna

Description

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.

References (3)

[Third Party Advisory] https://github.com/openclaw/openclaw/security/advisories/GHSA-mf5g-6r6f-ghhm

[Patch] https://github.com/openclaw/openclaw/commit/0b4d07337467f4d40a0cc1ced83d45ceaec0863c

View Patch ZIP pw:eip

[Third Party Advisory] https://www.vulncheck.com/advisories/openclaw-pre-authentication-rate-limit-bypass-in-webhook-token-validation

Scores

CVSS v3 4.8

EPSS 0.0007

EPSS Percentile 21.9%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Details

CWE

CWE-307

Status published

Products (4)

npm/openclaw 0 - 2026.3.28npm

OpenClaw/OpenClaw < 2026.3.25

openclaw/openclaw < 2026.3.25

OpenClaw/OpenClaw 2026.3.25

Published Apr 09, 2026

Tracked Since Apr 10, 2026