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CWE

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CVE-2026-1528

Published: Mar 12, 2026

Modified: Mar 13, 2026

PUBLISHED

CVSS v3.1

7.5

HIGH

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.

Vendor	Product	Versions
undici	undici	affected `>= 6.0.0 < 6.24.0; 7.0.0 < 7.24.0` unaffected `6.24.0: 7.24.0`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

References

https://github.com/nodejs/undici/security/advisories/GHSA-f269-vfmq-vjvj

https://hackerone.com/reports/3537648

https://cna.openjsf.org/security-advisories.html

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