GHSA-f269-vfmq-vjvj
Undici: Malicious WebSocket 64-bit length overflows parser and crashes the client
At a glance
- Published
- Updated
- CVE
- CVE-2026-1528
- CVSS_V3
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Description
### Impact A server can reply with a WebSocket frame using the 64-bit length form and an extremely large length. undici's ByteParser overflows internal math, ends up in an invalid state, and throws a fatal TypeError that terminates the process. ### Patches Patched in the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later. ### Workarounds There are no workarounds.
Affected packages
| Package | Versions |
|---|---|
| npm · undici | introduced 6.0.0, fixed 6.24.0 |
| npm · undici | introduced 7.0.0, fixed 7.24.0 |
References
- https://github.com/nodejs/undici/security/advisories/GHSA-f269-vfmq-vjvj WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-1528 ADVISORY
- https://hackerone.com/reports/3537648 WEB
- https://cna.openjsf.org/security-advisories.html WEB
- https://github.com/nodejs/undici PACKAGE
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |