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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.

PUBLISHED Reserved 2026-01-05 | Published 2026-01-14 | Updated 2026-01-14 | Assigner GitHub_M




LOW: 3.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Problem types

CWE-770: Allocation of Resources Without Limits or Throttling

Product status

< 6.23.0
affected

>= 7.0.0, < 7.18.2
affected

References

github.com/...undici/security/advisories/GHSA-g9mf-h72j-4rw9

github.com/...ommit/b04e3cbb569c1596f86c108e9b52c79d8475dcb3

cve.org (CVE-2026-22036)

nvd.nist.gov (CVE-2026-22036)

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