#VU125158 Improper Restriction of Excessive Authentication Attempts in OpenClaw - CVE-2026-34505
Published: April 8, 2026
Vulnerability identifier: #VU125158
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-34505
CWE-ID: CWE-307
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
OpenClaw
OpenClaw
Software vendor:
OpenClaw
OpenClaw
Description
The vulnerability allows a remote attacker to forge Zalo webhook traffic.
The vulnerability exists due to improper restriction of excessive authentication attempts in the Zalo webhook handler when processing webhook requests with invalid secrets. A remote attacker can repeatedly guess the webhook secret to forge Zalo webhook traffic.
Requests with an invalid secret returned 401 responses but did not count against the rate limiter, so repeated guesses would not trigger 429 responses.
Remediation
Install security update from vendor's website.