CVE-2026-41399

HIGH EPSS 23.5%
Published Apr 28, 20262mo ago · Modified Jun 17, 20261w ago
8.7 CVSS 4.0
High
Find Similar
Published Apr 28, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
8.7
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
23.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-770

Affected Products 1

VendorProductVersionRange
openclawopenclaw* <2026.3.28

References 2

  • github.com https://github.com/openclaw/openclaw/security/advisories/GHSA-f44p-c7w9-7xr7
    PatchVendor Advisory
  • vulncheck.com https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-unbounded-pre-auth-websocket-upgrades
    Third Party Advisory

Remediation

  • github.com https://github.com/openclaw/openclaw/security/advisories/GHSA-f44p-c7w9-7xr7
    PatchVendor Advisory