CVE-2026-41399CWE-770

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

High · published April 28, 2026

CVSS v4.0
8.7
EPSS
1%
Percentile
47.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
Vector
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
EPSS
0.00581 · 47.0th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-04-28T18:09Z
EPSS history
Timeline
  • 28 APR 18:09Z
    OpenClaw < 2026.3.28 - Denial of Service via Unbounded Pre-auth WebSocket Upgrades
    cvelistv5