🛡️ CVE-2026-42437 — openclaw

🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-400 NVD
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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 [email protected] 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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Weakness class

CVE-2026-42437 is classified as CWE-400: Uncontrolled Resource Consumption. A request can consume memory, CPU or storage without limit, exhausting capacity for everyone else.

Affected software

CVE-2026-42437 is recorded against 2 packages.

  • openclaw
  • unknown

Timeline and source

Published on 17 April 2026 and last revised on 8 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Web)
github.com (Web)
github.com (Package)
www.vulncheck.com (Web)

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE CWE-400
Public Exploit ✅ No
Source NVD
Published 2026-04-17
Updated 2026-08-12
Modified 2026-06-08
Fix URL N/A

Affected Packages

Software From version Fixed in
openclaw
unknown

Similar Threats

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