CVE-2026-22036

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

14/01/2026

Last modified:

22/01/2026

Description

Undici is an HTTP/1.1 client for Node.js. Prior to 7.18.0 and 6.23.0, the number of links in the decompression chain is unbounded and the default maxHeaderSize allows a malicious server to insert thousands compression steps leading to high CPU usage and excessive memory allocation. This vulnerability is fixed in 7.18.0 and 6.23.0.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.90 MEDIUM
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.90

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:nodejs:undici::::::node.js::*		6.23.0 (excluding)
cpe:2.3:a:nodejs:undici::::::node.js::*	7.0.0 (including)	7.18.2 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2026-22036

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools