CVE-2026-35628CWE-307

OpenClaw < 2026.3.25 - Brute-Force Attack via Missing Telegram Webhook Rate Limiting

Medium · published April 9, 2026

CVSS v4.0
6.3
EPSS
0%
Percentile
33.9
In the wild
Unconfirmed
What it is

OpenClaw before 2026.3.25 contains a missing rate limiting vulnerability in Telegram webhook authentication that allows attackers to brute-force weak webhook secrets. The vulnerability enables repeated authentication guesses without throttling, permitting attackers to systematically guess webhook secrets through brute-force attacks.

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
0.00407 · 33.9th 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 - Brute-Force Attack via Missing Telegram Webhook Rate Limiting
    cvelistv5