CVE-2026-41399: Openclaw

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

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.

Affected products

• Openclaw Openclaw: before 2026.3.28 (fixed in 2026.3.28)

Published 2026-04-28. Last modified 2026-06-17.