CVE-2026-22036

CWE-770 — Allocation without Limits8 documents7 sources
Severity
7.5HIGH
EPSS
0.0%
top 94.57%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Nodejs Undici
Timeline
PublishedJan 14

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.

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 2.2 | Impact: 3.6

Affected Packages4 packages

▶CVEListV5nodejs/undici< 6.23.0+1
▶NVDnodejs/undici7.0.0 — 7.18.2+1
▶Debiannode-undici< 7.18.2+dfsg+~cs3.2.0-1
▶npmundici7.0.0 — 7.18.2+1

Patches

Patch: github.com ↗

🔴Vulnerability Details

4
OSV
Undici has an unbounded decompression chain in HTTP responses on Node.js Fetch API via Content-Encoding leads to resource exhaustion↗2026-01-14
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OSV
CVE-2026-22036: Undici is an HTTP/1↗2026-01-14
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CVEList
Undici has an unbounded decompression chain in HTTP responses on Node.js Fetch API via Content-Encoding leads to resource exhaustion↗2026-01-14
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GHSA
Undici has an unbounded decompression chain in HTTP responses on Node.js Fetch API via Content-Encoding leads to resource exhaustion↗2026-01-14
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📋Vendor Advisories

2
Red Hat
undici: Undici: Denial of Service via excessive decompression steps↗2026-01-14
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Debian
CVE-2026-22036: node-undici - Undici is an HTTP/1.1 client for Node.js. Prior to 7.18.0 and 6.23.0, the number...↗2026
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🕵️Threat Intelligence

1
Wiz
CVE-2026-22036 Impact, Exploitability, and Mitigation Steps | Wiz↗
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CVE-2026-22036 (HIGH CVSS 7.5) | Undici is an HTTP/1.1 client for No | cvebase.io