OpenClaw < 2026.4.2 - Loopback Protection Bypass via Trailing-Dot Localhost in CDP Discovery
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-639.
Summary
OpenClaw before 2026.4.2 fails to normalize trailing-dot localhost hosts in remote CDP discovery responses, allowing bypass of loopback protections. Attackers can craft hostile discovery responses returning localhost. to retarget authenticated browser control toward localhost endpoints and expose browser state.
Why it matters now
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 2026.4.2 | 2026.4.2 | Patch available | CNA |
| — | openclaw (npm) | before 2026.4.2 | 2026.4.2 | Patch available | GHSA-fh32-73r9-rgh5 |
- OpenClaw VendorOpenClaw Affected before 2026.4.2 Fixed in 2026.4.2 Patch available CNA
- openclaw (npm) Vendor— Affected before 2026.4.2 Fixed in 2026.4.2 Patch available GHSA-fh32-73r9-rgh5
Remediation
- Fix · CNA OpenClaw (OpenClaw) Fixed in 2026.4.2
- Fix · GHSA-fh32-73r9-rgh5 openclaw (npm) Fixed in 2026.4.2 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-41372
- 2026-10-03 Alias added: GHSA-fh32-73r9-rgh5
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-2026-41372 · CVE Program
- CVE-2026-41372 · NVD
- FIRST EPSS
- GHSA-fh32-73r9-rgh5 · GitHub Advisory Database · CC BY 4.0
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