🛡️ CVE-2026-42437 — openclaw
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
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| openclaw | — | — |
| unknown | — | — |
References
Similar Threats
- Critical CVE-2026-22172
- Medium CVE-2026-22170
- Medium CVE-2026-22169
- High CVE-2026-22171
- Medium CVE-2026-22174
More CVE 2026 advisories
Browse all of CVE 2026 in the advisory index.
Site Security Check
Is openclaw part of your stack?
CVE-2026-42437 is rated CVSS 8.0 High. BotEraser scans your installation against known CVE records and tells you whether this vulnerability applies to the versions you actually run.
Scan My Site Free →No credit card required · Results in minutes
ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.