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CVE

CVE-2026-42437

OpenClaw: Voice-call realtime WebSocket accepted oversized frames
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CVE

CVE-2026-42437

OpenClaw: Voice-call realtime WebSocket accepted oversized frames

Summary

Voice-call realtime WebSocket accepted oversized frames.

Affected Packages / Versions

  • Package: openclaw
  • Ecosystem: npm
  • Affected versions: >= 2026.4.9 < 2026.4.10
  • Patched versions: >= 2026.4.10

Impact

The voice-call realtime WebSocket path could accept oversized frames, creating a remote availability risk for deployments exposing that webhook path.

Technical Details

The fix rejects oversized realtime WebSocket frames before processing them.

Fix

The issue was fixed in #63890. The first stable tag containing the fix is v2026.4.10, and openclaw@2026.4.14 includes the fix.

Fix Commit(s)

  • afadb7dae6738819ad9c7d2597ace0516957d20e
  • PR: #63890

Release Process Note

Users should upgrade to openclaw 2026.4.10 or newer. The latest npm release, 2026.4.14, already includes the fix.

Reporters

Thanks to G0odUser from ADLab of VenusTech

Thanks to @zsxsoft, with sponsorship from @KeenSecurityLab and @qclawer for reporting this issue.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
8.2
-
4.0
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:X/V:X/RE:X/U:X
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
C
H
U
-

Related Resources

No items found.

References

https://github.com/openclaw/openclaw/security/advisories/GHSA-vw3h-q6xq-jjm5, https://nvd.nist.gov/vuln/detail/CVE-2026-42437, https://github.com/openclaw/openclaw/pull/63890, https://github.com/openclaw/openclaw/commit/afadb7dae6738819ad9c7d2597ace0516957d20e, https://github.com/openclaw/openclaw, https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-oversized-websocket-frames-in-voice-call-realtime-path

Severity

7.5

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
7.5
EPSS Probability
0.00131%
EPSS Percentile
0.32205%
Introduced Version
2026.4.9
Fix Available
2026.4.10

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