CVE-2026-41399

HIGH

OpenClaw < 2026.3.28 - Denial of Service via Unbounded Pre-auth WebSocket Upgrades

Title source: cna

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.

References (2)

[Vendor Advisory] https://github.com/openclaw/openclaw/security/advisories/GHSA-f44p-c7w9-7xr7

[Third Party Advisory] https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-unbounded-pre-auth-websocket-upgrades

Scores

CVSS v3 7.5

EPSS 0.0006

EPSS Percentile 18.4%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-770

Status published

Products (2)

OpenClaw/OpenClaw < 2026.3.28

OpenClaw/OpenClaw 2026.3.28

Published Apr 28, 2026

Tracked Since Apr 29, 2026