CVE-2026-41399 Details
Description
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.
A denial-of-service vulnerability has been identified in OpenClaw versions prior to 2026.3.28. The issue arises because the gateway accepts an unlimited number of concurrent, unauthenticated WebSocket upgrade requests without first allocating a budget for authentication. This flaw allows unauthenticated network attackers to consume socket and worker resources, disrupting WebSocket service for legitimate users.
Users can upgrade to OpenClaw version 2026.3.28 or later to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 29, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/openclaw/openclaw/security/advisories/GHSA-f44p-c7w9-7xr7 | [email protected] | PatchVendor Advisory |
| https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-unbounded-pre-auth-websocket-upgrades | [email protected] | Third Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-770 | Allocation of Resources Without Limits or Throttling | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| openclaw openclaw | < 2026.3.28 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 30, 2026 | Initial Analysis | [email protected] |
| Apr 28, 2026 | New CVE Received | [email protected] |