Resource exhaustion in Openclaw
CVE-2026-41399
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (45.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 45.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.006 · change: +0.003
Affected products
- Openclaw — versions 0, 2026.3.28
Weakness classification (CWE)
References
- github.com/openclaw/openclaw/security/advisories/GHSA-f44p-c7w9-7xr7 (vendor-advisory, Patch, Vendor Advisory)
- www.vulncheck.com/advisories/openclaw-denial-of-service-via-unbounded-pre-auth-… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-41399?
- CVE-2026-41399 is a high-severity vulnerability in Openclaw, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-04-28.
- How severe is CVE-2026-41399?
- High severity. CVSS v3 base score is 7.5 out of 10.