VULNERABILITY INTELLIGENCE

CVE-2026-1528

CVSS score7.5 HIGH
EPSS probability0.51%
CISA KEVNot currently listed
Published2026-03-12
Last modified2026-09-04
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Weakness classification

  • ce714d77-add3-4f53-aff5-83d477b104bb: CWE-248
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-248

Primary references