OpenClaw < 2026.4.8 - Unsafe Request Body Replay via fetchWithSsrFGuard Cross-Origin Redirects
Priority LOW 37CWE-601Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Spoofing, Security bypass
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-601 and CWE-345.
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00316 24th percentileScored 2026-11-07
Fix Fixed OpenClaw (OpenClaw): 2026.4.8openclaw (npm): 2026.4.8
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| OpenClaw | OpenClaw | before 2026.4.8 | 2026.4.8 | Patch available | CNA |
| — | openclaw (npm) | before 2026.4.8 | 2026.4.8 | Patch available | GHSA-qx8j-g322-qj6m |
- OpenClaw VendorOpenClaw Affected before 2026.4.8 Fixed in 2026.4.8 Patch available CNA
- openclaw (npm) Vendor— Affected before 2026.4.8 Fixed in 2026.4.8 Patch available GHSA-qx8j-g322-qj6m
Remediation
- Fix · CNA OpenClaw (OpenClaw) Fixed in 2026.4.8
- Fix · GHSA-qx8j-g322-qj6m openclaw (npm) Fixed in 2026.4.8 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-40037
- 2026-10-03 Alias added: GHSA-qx8j-g322-qj6m
- 2026-10-29 Title updated · CNA
References
More Openclaw vulnerabilities
- TI-2026-25309 OpenClaw < 2026.3.28 Media Parsing Path Traversal to Arbitrary File Read CVSS 4.0HIGH 8.7
- TI-2026-20394 Exposure of resource to wrong sphere in OpenClaw CVSS 3.1HIGH 8.8
- TI-2026-27742 OpenClaw < 2026.3.24 - Arbitrary Code Execution via .npmrc in Local Plugin/Hook Installation CVSS 4.0HIGH 8.4
- TI-2026-27766 OpenClaw < 2026.3.24 - Denial of Service via Feishu Webhook Pre-Auth Body Parsing CVSS 4.0MEDIUM 6.9
- TI-2026-07315 OpenClaw bluebubbles Webhook monitor.ts handleBlueBubblesWebhookRequest improper authentication CVSS 4.0MEDIUM 6.9
- TI-2026-17789 OpenClaw < 2026.2.22 - Allowlist Bypass via Command Substitution in system.run CVSS 4.0HIGH 7.5
Sources
- CVE-2026-40037 · CVE Program
- CVE-2026-40037 · NVD
- FIRST EPSS
- GHSA-qx8j-g322-qj6m · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences