CVE-2026-1528

HIGH

undici 6.0.0-6.23.9 7.0.0-7.23.9 - Denial of Service via WebSocket Frame Length Overflow

Title source: llm
STIX 2.1

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.

References (3)

Core 3

Scores

CVSS v3 7.5
EPSS 0.0034
EPSS Percentile 25.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-248 CWE-1284
Status published
Products (4)
nodejs/undici < 6.24.0
npm/undici 6.0.0 - 6.24.0npm
undici/undici 6.24.0: 7.24.0
undici/undici >= 6.0.0 < 6.24.0; 7.0.0 < 7.24.0
Published Mar 12, 2026
Tracked Since Mar 13, 2026