CVE-2026-42437 json
OpenClaw 2026.4.9 < 2026.4.10 - Denial of Service via Oversized WebSocket Frames in Voice-call Realtime Path
published 2026-04-17 6 mo ago modified 2026-06-17 4 mo ago also GHSA-vw3h-q6xq-jjm5 , EUVD-2026-27257
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 35%
- public exploits
- 0
- none known
Summary
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 voice-call realtime WebSocket path.
Patch / fix
- npm openclaw 2026.4.10
- OpenClaw OpenClaw 2026.4.10
- github.com/openclaw/openclaw@afadb7d commit
- github.com/openclaw/openclaw#63890 pull request
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 6 mo ago
Exploit prediction
0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.2 | 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 |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| CNA | 4.0 | 8.2 | 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 |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | openclaw | >=2026.4.9, <2026.4.10 |
2026.4.10 |
Affected products
- OpenClaw OpenClaw
Classification
References
-
github.com
/openclaw/openclaw/commit/afadb7dae6738819ad9c7d2597ace0516957d20e
patch, web
-
github.com
/openclaw/openclaw/pull/63890
web
-
github.com
/openclaw/openclaw/security/advisories/GHSA-vw3h-q6xq-jjm5
vendor-advisory, web
-
vulncheck.com
/advisories/openclaw-denial-of-service-via-oversized-websocket-frames-in-voice-call-realtime-path
third-party-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-42437
advisory
-
github.com
/openclaw/openclaw
package
Sources
- CVE List CVE-2026-42437
- GitHub Advisory GHSA-vw3h-q6xq-jjm5
- NVD CVE-2026-42437
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