MEDIUM

CVE-2026-22036

CVSS v3

5.9

MEDIUM

EPSS Score

0.5 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

undicinpmall versions · fixed in 6.23.0

Vendor advisories

CVE-2026-22036 Red Hat Product Security69 products fixed · 87 known affected
undici: Undici: Denial of Service via excessive decompression steps
io.cryostat-cryostat as a component of Cryostat 4 · openshift-pipelines/pipelines-console-plugin-rhel8 as a component of OpenShift Pipelines · openshift-pipelines/pipelines-hub-api-rhel8 as a component of OpenShift Pipelines
RHSA-2026:56431 Red Hat Product Security68 products fixed
Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.18.27 security, enhancement & bug fix update
RHSA-2026:24841 Red Hat Product Security1 product fixed
Red Hat Security Advisory: Red Hat Developer Hub 1.10.0 release.

Full record on NVD

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.

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2026-01-14
Last Modified: 2026-01-22

Frequently asked questions

What is CVE-2026-22036?

Is CVE-2026-22036 actively exploited?

Active exploitation of CVE-2026-22036 has not been confirmed. Its EPSS score was 0.5% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-22036?

CVE-2026-22036 has a CVSS v3 base score of 5.9 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

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