CVE-2026-40037 json
OpenClaw < 2026.4.8 - Unsafe Request Body Replay via fetchWithSsrFGuard Cross-Origin Redirects
published 2026-04-08 7 mo ago modified 2026-10-29 10 d ago also GHSA-qx8j-g322-qj6m , EUVD-2026-20781
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 24%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.32% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 7.1 | 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 |
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
| CNA | 4.0 | 7.1 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | openclaw | <2026.4.8 |
2026.4.8 |
Affected products
- OpenClaw OpenClaw
Classification
References
-
github.com
/openclaw/openclaw/commit/d7c3210cd6f5fdfdc1beff4c9541673e814354d5
patch, web
-
github.com
/openclaw/openclaw/security/advisories/GHSA-qx8j-g322-qj6m
vendor-advisory, web
-
vulncheck.com
/advisories/openclaw-unsafe-request-body-replay-via-fetchwithssrfguard-cross-origin-redirects
third-party-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-40037
advisory
-
github.com
/openclaw/openclaw
package
Sources
- CVE List CVE-2026-40037
- GitHub Advisory GHSA-qx8j-g322-qj6m
- NVD CVE-2026-40037
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