CVE-2026-1528

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CVSS 3.1

7.5 high

EPSS

<1%p40

Published

Mar 12, 2026 (Mar 12, 2026)

Modified

Sep 4, 2026

Description

ImpactA 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.

Vendors: nodejs
Products: undici
Weakness: CWE-248, CWE-1284
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (0.5%)

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