OpenClaw < 2026.3.28 - Denial of Service via Unbounded Pre-auth WebSocket Upgrades
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-770.
Summary
OpenClaw before 2026.3.28 accepts unbounded concurrent unauthenticated WebSocket upgrades without pre-authentication budget allocation. Unauthenticated network attackers can exhaust socket and worker capacity to disrupt WebSocket availability for legitimate clients.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- 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 2026.3.28 | 2026.3.28 | Patch available | CNA |
| — | openclaw (npm) | before 2026.3.28 | 2026.3.28 | Patch available | GHSA-f44p-c7w9-7xr7 |
- OpenClaw VendorOpenClaw Affected before 2026.3.28 Fixed in 2026.3.28 Patch available CNA
- openclaw (npm) Vendor— Affected before 2026.3.28 Fixed in 2026.3.28 Patch available GHSA-f44p-c7w9-7xr7
Remediation
- Fix · CNA OpenClaw (OpenClaw) Fixed in 2026.3.28
- Fix · GHSA-f44p-c7w9-7xr7 openclaw (npm) Fixed in 2026.3.28 Advisory →
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
OpenClaw 2026.3.28
6 records Highest priority Priority MEDIUM 1 MEDIUM, 5 LOW
Other records, highest priority first
- TI-2026-29996 OpenClaw < 2026.3.28 - Webhook Replay via Query Parameter Reordering in Plivo V3Priority MEDIUM 41
- TI-2026-29991 OpenClaw < 2026.3.28 - Exec Allowlist Bypass via Unregistered /usr/bin/script WrapperPriority LOW 32
- TI-2026-29981 OpenClaw < 2026.3.28 - Arbitrary Execution Allowlist via Wrapper Carrier ExecutablesPriority LOW 32
Timeline
- 2026-10-02 Threatist record created from CVE-2026-41399
- 2026-10-03 Alias added: GHSA-f44p-c7w9-7xr7
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-2026-41399 · CVE Program
- CVE-2026-41399 · NVD
- FIRST EPSS
- GHSA-f44p-c7w9-7xr7 · 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