What is CVE-2026-42437?

CVE-2026-42437 is a high-severity vulnerability in Openclaw, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-05-05.

How severe is CVE-2026-42437?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Openclaw

CVE-2026-42437

OpenClaw versions 2026.4.9 before 2026.4.10 contain a denial of service vulnerability in the voice-call realtime WebSocket path that accepts oversized frames without proper validation. Remote attackers can send oversized WebSocket frames t…

EPSS: 0.001 (30.5th percentile) — read the EPSS interpretation.

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.

Affected products

Openclaw — versions 2026.4.9, 2026.4.10

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-42437?: CVE-2026-42437 is a high-severity vulnerability in Openclaw, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-05-05.
How severe is CVE-2026-42437?: High severity. CVSS v3 base score is 7.5 out of 10.