High 7.5Published May 5, 2026

CVE-2026-42437OpenClaw 2026.4.9 < 2026.4.10 - Denial of Service via Oversized WebSocket Frames in Voice-call Realtime Path

Updated under an hour ago (Oct 26, 2026, 10:10 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for OpenClaw

Exploited in the last 30 days

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 to cause service unavailability for deployments exposing the voice-call realtime WebSocket path.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: May 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

OpenClaw OpenClaw openclaw:openclaw (from the name)	from 2026.4.9 before 2026.4.10; 2026.4.10 not affected	CNA record

References

https://github.com/openclaw/openclaw/security/advisories/GHSA-vw3h-q6xq-jjm5vendor-advisory
https://github.com/openclaw/openclaw/commit/afadb7dae6738819ad9c7d2597ace0516957d20epatch
https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-oversized-websocket-frames-in-voice-call-realtime-paththird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.