---
id: CVE-2026-40037
title: >-
  OpenClaw < 2026.3.31 - Unsafe Request Body Replay via fetchWithSsrFGuard
  Cross-Origin Redirects
summary: >-
  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
  red…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-601
vendor: OpenClaw
product: OpenClaw
affected:
  - OpenClaw < 2026.4.8
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-04-09T14:40:02.487326Z'
published: '2026-04-08'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T14:17:36.993Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-40037'
references:
  - url: >-
      https://github.com/openclaw/openclaw/security/advisories/GHSA-qx8j-g322-qj6m
    label: GitHub Security Advisory (GHSA-qx8j-g322-qj6m)
  - url: >-
      https://github.com/openclaw/openclaw/commit/d7c3210cd6f5fdfdc1beff4c9541673e814354d5
    label: Patch Commit
  - url: >-
      https://www.vulncheck.com/advisories/openclaw-unsafe-request-body-replay-via-fetchwithssrfguard-cross-origin-redirects
    label: >-
      VulnCheck Advisory: OpenClaw < 2026.3.31 - Unsafe Request Body Replay via
      fetchWithSsrFGuard Cross-Origin Redirects
tags:
  - cve.org
epss: 0.00546
epssPercentile: 0.43489
ingestedAt: '2026-09-24T15:45:56.732Z'
---

## Overview

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.

## Affected

- `OpenClaw < 2026.4.8`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.