GHSA-f269-vfmq-vjvj
Suggest an improvement- Source
- https://github.com/advisories/GHSA-f269-vfmq-vjvj
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-f269-vfmq-vjvj/GHSA-f269-vfmq-vjvj.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-f269-vfmq-vjvj
- Aliases
- Downstream
- Related
- Published
- 2026-03-13T20:07:26Z
- Modified
- 2026-03-18T22:58:59.863318Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- Undici: Malicious WebSocket 64-bit length overflows parser and crashes the client
- Details
-
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.
- Database specific
{ "github_reviewed_at": "2026-03-13T20:07:26Z", "nvd_published_at": "2026-03-12T21:16:25Z", "cwe_ids": [ "CWE-1284", "CWE-248" ], "severity": "HIGH", "github_reviewed": true }- References
Affected packages
npm / undici
Package
- Name
- undici
- View open source insights on deps.dev
- Purl
- pkg:npm/undici
npm / undici
Package
- Name
- undici
- View open source insights on deps.dev
- Purl
- pkg:npm/undici