CVE-2026-40037CWE-601

OpenClaw < 2026.3.31 - Unsafe Request Body Replay via fetchWithSsrFGuard Cross-Origin Redirects

High · published April 8, 2026

CVSS v4.0
7.1
EPSS
1%
Percentile
45.0
In the wild
Unconfirmed
What it is

OpenClaw before 2026.3.31 (patched in 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.

The record
Technical detail
CVSS v4.0
7.1 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00546 · 45.0th percentile
Weakness
CWE-601 · URL Redirection to Untrusted Site ('Open Redirect')
Published
2026-04-08T21:35Z
EPSS history
Timeline
  • 08 APR 21:35Z
    OpenClaw < 2026.3.31 - Unsafe Request Body Replay via fetchWithSsrFGuard Cross-Origin Redirects
    cvelistv5