Vulnerability · Published Apr 8, 2026 · Assigned by VulnCheck
CVE-2026-40037OpenClaw < 2026.4.8 - Unsafe Request Body Replay via fetchWithSsrFGuard Cross-Origin Redirects
Medium 6.5
In plain English
A medium-severity open redirect in OpenClaw from OpenClaw. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.3%top 75.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
OpenClaw before 2026.4.8 contains a request body replay vulnerability in fetchWithSsrFGuard that allows unsafe request bodies to be resent across cross-origin redirects. Attackers can exploit this by triggering redirects to exfiltrate sensitive request data or headers to unintended origins.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | openclaw | 2026.4.8 | GHSA-qx8j-g322-qj6m |
Affected products (as reported)
Weakness: CWE-601 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
References
- GitHub Security Advisory (GHSA-qx8j-g322-qj6m) vendor-advisory
- Patch Commit patch
- VulnCheck Advisory: OpenClaw < 2026.4.8 - Unsafe Request Body Replay via fetchWithSsrFGuard Cross-Origin Redirects third-party-advisory