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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 webhook path.

PUBLISHED Reserved 2026-04-27 | Published 2026-05-05 | Updated 2026-05-05 | Assigner VulnCheck




HIGH: 8.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-770: Allocation of Resources Without Limits or Throttling

Product status

Default status
unaffected

2026.4.9 (semver) before 2026.4.10
affected

2026.4.10 (semver)
unaffected

Credits

G0odUser reporter

References

github.com/...enclaw/security/advisories/GHSA-vw3h-q6xq-jjm5 (GitHub Security Advisory (GHSA-vw3h-q6xq-jjm5)) vendor-advisory

github.com/...ommit/afadb7dae6738819ad9c7d2597ace0516957d20e (Patch Commit) patch

www.vulncheck.com/...cket-frames-in-voice-call-realtime-path (VulnCheck Advisory: OpenClaw 2026.4.9 < 2026.4.10 - Denial of Service via Oversized WebSocket Frames in Voice-call Realtime Path) third-party-advisory

cve.org (CVE-2026-42437)

nvd.nist.gov (CVE-2026-42437)

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