Open redirect in OpenClaw - CVE-2026-40037
Published: April 30, 2026
Vulnerability identifier: #VU128595
CSH Severity: High
CVSS v4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-40037
CWE-ID: CWE-601
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause sensitive request bodies or headers to be sent to an unintended cross-origin destination.
The vulnerability exists due to improper handling of cross-origin redirects in fetchWithSsrFGuard when following cross-origin redirects. A remote attacker can trigger a redirect chain that replays an unsafe request body or headers to cause sensitive request bodies or headers to be sent to an unintended cross-origin destination.
Affected software
OpenClaw
How to mitigate CVE-2026-40037
Install security update from vendor's website.
OpenClaw - update to 2026.4.8