CVE-2026-2229
1 advisory.
npm/undici CVE-2026-2229: high 7.5, EPSS 0.89%
Undici has Unhandled Exception in WebSocket Client Due to Invalid server_max_window_bits Validation
Action: Upgrade undici to 6.24.0 or later.
npm i undici@6.24.0npm i undici@7.24.0Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 6.24.0 | - |
| 7.0.0 | 7.24.0 | - |
Fixed versions
| 6.24.0 | 7.24.0 |
Sources
- osv: GHSA-v9p9-hfj2-hcw8
- https://github.com/nodejs/undici/security/advisories/GHSA-v9p9-hfj2-hcw8
- https://nvd.nist.gov/vuln/detail/CVE-2026-2229
- https://hackerone.com/reports/3487486
- https://cna.openjsf.org/security-advisories.html
- https://datatracker.ietf.org/doc/html/rfc7692
- https://github.com/nodejs/undici
- https://nodejs.org/api/zlib.html#class-zlibinflateraw
CVE-2026-2229 · published · modified · JSON