Information Exposure Through Timing Discrepancy in OpenClaw - CVE-2026-28475
Published: May 4, 2026
Vulnerability identifier: #VU129447
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-28475
CWE-ID: CWE-208
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: OpenClaw
Affected software:
OpenClaw
OpenClaw
Detailed vulnerability description
The vulnerability allows a remote attacker to disclose the hook token.
The vulnerability exists due to observable timing discrepancies in hook token comparison in the hooks endpoint when handling token validation requests. A remote attacker can send many requests and measure response timing to disclose the hook token.
Exploitation typically requires the hooks endpoint to be exposed to an untrusted network, and real-world latency and jitter can make reliable measurement difficult.
How to mitigate CVE-2026-28475
Install security update from vendor's website.