Vulnerability Report

CVE-2026-1528

Title: Undici WebSocket Client DoS via Large Frame Length Overflow

Other

Proof Of Concept

No public PoC currently indexed for CVE-2026-1528.

CWE Category CWE-248

Published Date Mar 12, 2026

Modified Date Mar 20, 2026

Exploit Status Not Found

Score 7.5 CVSS v3.1

Exploit Probability (EPSS)

0.12%

Vulnerability Summary

CVE-2026-1528: 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.

Impacted Vendors

nodejs 1

Reference Links

https://cna.openjsf.org/security-advisories.html https://github.com/nodejs/undici/security/advisories/GHSA-f269-vfmq-vjvj https://hackerone.com/reports/3537648

CVSS v3.1

Source Entity ce714d77-add3-4f53-aff5-83d477b104bb

Severity HIGH

7.5

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-1528 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

March 20, 2026 MODIFIED

Vulnerability data updated via NVD.

March 20, 2026 MODIFIED

Vulnerability data updated via NVD.

March 13, 2026 MODIFIED

Vulnerability data updated via NVD.

March 12, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


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

Affected Stack

No specific products linked.