{"id":"CVE-2026-42437","aliases":["GHSA-vw3h-q6xq-jjm5"],"url":"https://o3.security/vulnerability/CVE-2026-42437","summary":"OpenClaw 2026.4.9 < 2026.4.10 - Denial of Service via Oversized WebSocket Frames in Voice-call Realtime Path","details":"## Summary\n\nVoice-call realtime WebSocket accepted oversized frames.\n\n## Affected Packages / Versions\n\n- Package: `openclaw`\n- Ecosystem: npm\n- Affected versions: `>= 2026.4.9 < 2026.4.10`\n- Patched versions: `>= 2026.4.10`\n\n## Impact\n\nThe voice-call realtime WebSocket path could accept oversized frames, creating a remote availability risk for deployments exposing that webhook path.\n\n## Technical Details\n\nThe fix rejects oversized realtime WebSocket frames before processing them.\n\n## Fix\n\nThe issue was fixed in #63890. The first stable tag containing the fix is `v2026.4.10`, and `openclaw@2026.4.14` includes the fix.\n\n## Fix Commit(s)\n\n- `afadb7dae6738819ad9c7d2597ace0516957d20e`\n- PR: #63890\n\n## Release Process Note\n\nUsers should upgrade to `openclaw` 2026.4.10 or newer. The latest npm release, `2026.4.14`, already includes the fix.\n\n## Reporters\n\nThanks to G0odUser from ADLab of VenusTech\nThanks to @zsxsoft, with sponsorship from @KeenSecurityLab and @qclawer for reporting this issue.","published":"2026-05-05T11:24:55.977Z","modified":"2026-10-28T02:30:49.642039987Z","cvss":null,"epss":{"score":0.00417,"percentile":0.34595,"asOf":"2026-08-12"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"openclaw","fixedVersion":"2026.4.10"}],"fix":{"url":"https://github.com/openclaw/openclaw/commit/afadb7dae6738819ad9c7d2597ace0516957d20e","label":"openclaw/openclaw@afadb7d"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42437.json"},{"type":"ADVISORY","url":"https://github.com/openclaw/openclaw/security/advisories/GHSA-vw3h-q6xq-jjm5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42437"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/openclaw-denial-of-service-via-oversized-websocket-frames-in-voice-call-realtime-path"},{"type":"FIX","url":"https://github.com/openclaw/openclaw/commit/afadb7dae6738819ad9c7d2597ace0516957d20e"},{"type":"WEB","url":"https://github.com/openclaw/openclaw/pull/63890"},{"type":"PACKAGE","url":"https://github.com/openclaw/openclaw"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T02:30:49.642039987Z"}}