CVE-2026-42437
OpenClaw: Voice-call realtime WebSocket accepted oversized frames
Description
## 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 to fix CVE-2026-42437
To remediate CVE-2026-42437, upgrade the affected package to a fixed version below.
- —upgrade to 2026.4.10 or later
Is CVE-2026-42437 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 2026.4.9, < 2026.4.10
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |