AI agent vulnerability · OpenClaw

CVE-2026-40037: OpenClaw: `fetchWithSsrFGuard` replays unsafe request bodies across cross-origin redirects

highCVSS 4.0 7.4GHSA-qx8j-g322-qj6m

Impact fetchWithSsrFGuard replays unsafe request bodies across cross-origin redirects. A guarded fetch could resend unsafe request bodies or headers when following cross-origin redirects. OpenClaw is a user-controlled local assistant. This advisory is scoped to the OpenClaw trust model and does not assume a multi-tenant service boundary.

Published Apr 9, 2026 · Updated Apr 10, 2026

Affected packages

openclaw

Ecosystem: npm
Affected: < 2026.4.8
Fixed in: 2026.4.8
Check: npm ls openclaw

Advisory details

From the GitHub Advisory Database (CC BY 4.0).

Impact

fetchWithSsrFGuard replays unsafe request bodies across cross-origin redirects.

A guarded fetch could resend unsafe request bodies or headers when following cross-origin redirects.

OpenClaw is a user-controlled local assistant. This advisory is scoped to the OpenClaw trust model and does not assume a multi-tenant service boundary.

Affected Packages / Versions

Package: openclaw (npm)
Affected versions: <2026.3.31
Patched versions: 2026.4.8

Fix

The issue was fixed on main and is available in the patched npm version listed above. The verified fixed tree is commit d7c3210cd6f5fdfdc1beff4c9541673e814354d5.

Verification

The fix was re-checked against main before publication, including targeted regression tests for the affected security boundary.

Credits

Thanks @BG0ECV for reporting.

Credited to BG0ECV.

References

How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology

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