Input validation error in OpenClaw - #VU128812
Published: May 1, 2026
Vulnerability identifier: #VU128812
CSH Severity: Medium
CVSS v4: 6.9 [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]
CVE-ID: N/A
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass rate limiting for hook authentication brute-force attempts.
The vulnerability exists due to improper input validation in hook authentication rate limiting in src/gateway/server-http.ts and src/gateway/auth-rate-limit.ts when processing client IP addresses for failed authentication attempts. A remote attacker can alternate between IPv4 and IPv4-mapped IPv6 address forms to bypass rate limiting for hook authentication brute-force attempts.
The same client can be assigned separate rate-limit buckets when represented as an IPv4 address and as an IPv4-mapped IPv6 address.
Affected software
OpenClaw
Remediation
Install security update from vendor's website.
OpenClaw - update to 2026.2.22