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Vulnerability record · CVE-2026-42437 · published 5 May 2026

CVE-2026-42437: Allocation without limits vulnerability

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.

8.2 CVSS 4.0 High EPSS 0.75% · top 46.9% CWE-770 · Allocation without limits Deferred
8.2CVSS 4.0 base score
0.75%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
17 Jun 2026Last modified by NVD

Description

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:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/openclaw/openclaw/commit/afadb7dae6738819ad9c7d2597ace0516957d20e
https://github.com/openclaw/openclaw/security/advisories/GHSA-vw3h-q6xq-jjm5
https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-oversized-websocket-frames-in-voice-call-realtime-pa

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Source: NIST National Vulnerability Database (record CVE-2026-42437), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.