Request Body Replay Vulnerability in OpenClaw by OpenClaw Team
CVE-2026-40037

7.1HIGH

Key Information:

Vendor

Openclaw

Status
Openclaw
Vendor
CVE Published:
8 April 2026

What is CVE-2026-40037?

Prior to the 2026.4.8 release, OpenClaw suffered from a significant request body replay vulnerability in its function fetchWithSsrFGuard. This flaw allows malicious actors to exploit cross-origin redirects, which can lead to the unauthorized resending of potentially sensitive request data and headers to unintended origins. By leveraging this vulnerability, attackers can exfiltrate critical information without detection, posing a serious risk to user privacy and data integrity.

Affected Version(s)

OpenClaw 0 < 2026.3.31

OpenClaw 2026.4.8

References

https://github.com/openclaw/openclaw/security/advisories/...
third-party-advisory
https://github.com/openclaw/openclaw/commit/d7c3210cd6f5f...
patch
https://www.vulncheck.com/advisories/openclaw-unsafe-requ...
third-party-advisory

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

RaaX (@BG0ECV)
RaaX (@BG0ECV)
.