CVE-2026-22036

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.

CVSS v3 5.9 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/nodejs/undici/commit/b04e3cbb569c1596f86c108e9b52c79d8475dcb3	Patch
https://github.com/nodejs/undici/security/advisories/GHSA-g9mf-h72j-4rw9	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:nodejs:undici::::::node.js::*
	cpe:2.3:a:nodejs:undici::::::node.js::*

History

22 Jan 2026, 21:15

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~3.7~~	v2 : unknown v3 : 5.9

21 Jan 2026, 14:56

Type	Values Removed	Values Added
CPE		cpe:2.3:a:nodejs:undici::::::node.js::*
References	~~() https://github.com/nodejs/undici/commit/b04e3cbb569c1596f86c108e9b52c79d8475dcb3 -~~	() https://github.com/nodejs/undici/commit/b04e3cbb569c1596f86c108e9b52c79d8475dcb3 - Patch
References	~~() https://github.com/nodejs/undici/security/advisories/GHSA-g9mf-h72j-4rw9 -~~	() https://github.com/nodejs/undici/security/advisories/GHSA-g9mf-h72j-4rw9 - Vendor Advisory
First Time		Nodejs undici Nodejs

14 Jan 2026, 19:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-01-14 19:16

Updated : 2026-01-22 21:15

NVD link : CVE-2026-22036

Mitre link : CVE-2026-22036

CVE.ORG link : CVE-2026-22036

JSON object : View

Products Affected

nodejs

undici

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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