High severity · published May 5, 2026
CVE-2026-42437
OpenClaw 2026.4.9 < 2026.4.10 - Denial of Service via Oversized WebSocket Frames in Voice-call Realtime Path
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 35% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
OpenClaw · OpenClaw
2026.4.9 before 2026.4.10 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-42437
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-42437
github.com
https://github.com/openclaw/openclaw/commit/afadb7dae6738819ad9c7d2597ace0516957d20e
github.com
https://github.com/openclaw/openclaw/security/advisories/GHSA-vw3h-q6xq-jjm5
www.vulncheck.com
https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-oversized-websocket-frames-in-voice-call-realtime-path
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