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 (21)

Core 21
Core References

Scores

CVSS v3 7.5
EPSS 0.0049
EPSS Percentile 39.4%
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-1284 CWE-248
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