CVE catalog

CVE-2026-22036

node-undici affected and fixed versions

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.

Severity: Low · CVSS 3.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Published: Jan 14, 2026, 7:07:13 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.46% · Oct 27, 2026

Projects and upstream resources

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Version impact has not been established. The original provider fields are retained below.

Provider details and historical evidence

Original provider fields

{
  "package_releases": [
    {
      "name": "node-undici",
      "status": "fixed",
      "release": "sid",
      "version": "8.12.2+dfsg+~cs3.2.3-2"
    },
    {
      "name": "node-undici",
      "status": "fixed",
      "release": "forky",
      "version": "8.10.2+dfsg+~cs3.2.2-1"
    },
    {
      "name": "node-undici",
      "status": "vulnerable",
      "release": "trixie",
      "version": "7.3.0+dfsg1+~cs24.12.11-1"
    },
    {
      "name": "node-undici",
      "status": "vulnerable",
      "release": "bookworm",
      "version": "5.15.0+dfsg1+~cs20.10.9.3-1+deb12u4"
    },
    {
      "name": "node-undici",
      "status": "vulnerable",
      "release": "bookworm-security",
      "version": "5.15.0+dfsg1+~cs20.10.9.3-1+deb12u3"
    }
  ],
  "fixed_versions": [
    {
      "bug": 1125679,
      "name": "node-undici",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "7.18.2+dfsg+~cs3.2.0-1"
    },
    {
      "bug": 1125679,
      "name": "node-undici",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "7.18.2+dfsg+~cs3.2.0-1"
    },
    {
      "bug": 1125679,
      "name": "node-undici",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1125679,
      "name": "node-undici",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": ""
    }
  ],
  "distribution_packages": [
    {
      "name": "nodejs24",
      "distro": "opensuse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "24.13.0-2.1"
            }
          ]
        }
      ],
      "release": "tumbleweed",
      "versions": [],
      "ecosystem": "rpm",
      "fixed_version": "24.13.0-2.1",
      "provider_record_id": "OPENSUSE-SU-2026:10075-1"
    }
  ]
}

[Debian bug #1125679]

Publisher notes

[trixie] node-undici: Minor issue [bookworm] node-undici: Minor issue

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[node-llhttp]Unknown
Source package: [node-undici]
Details (4)
- 8.1.0~5.15.0+dfsg1+~cs20.10.9.3-1+deb12u4 · all · bookworm
  Affected
  dsa · node-undici · debian · bookworm; dsa · node-undici · debian · 12
- 8.1.0~5.15.0+dfsg1+~cs20.10.9.3-1+deb12u4 · all · bookworm
  Affected
  dsa · node-undici · debian · bookworm; dsa · node-undici · debian · 12
- 8.1.0~5.15.0+dfsg1+~cs20.10.9.3-1+deb12u3 · all · bookworm-security
  Affected
  dsa · node-undici · debian · bookworm; dsa · node-undici · debian · 12
- 8.1.0~5.15.0+dfsg1+~cs20.10.9.3-1+deb12u3 · all · bookworm-security
  Affected
  dsa · node-undici · debian · bookworm; dsa · node-undici · debian · 12
[node-undici]Unknown
Details (4)
- 5.15.0+dfsg1+~cs20.10.9.3-1+deb12u4 · all · bookworm
  Affected
  dsa · node-undici · debian · bookworm; dsa · node-undici · debian · 12
- 5.15.0+dfsg1+~cs20.10.9.3-1+deb12u4 · all · bookworm
  Affected
  dsa · node-undici · debian · bookworm; dsa · node-undici · debian · 12
- 5.15.0+dfsg1+~cs20.10.9.3-1+deb12u3 · all · bookworm-security
  Affected
  dsa · node-undici · debian · bookworm; dsa · node-undici · debian · 12
- 5.15.0+dfsg1+~cs20.10.9.3-1+deb12u3 · all · bookworm-security
  Affected
  dsa · node-undici · debian · bookworm; dsa · node-undici · debian · 12

[Debian 13 (Trixie)]

[libllhttp9.2]Unknown
Source package: [node-undici]
Details (2)
- 9.2.1~7.3.0+dfsg1+~cs24.12.11-1 · amd64 · trixie
  Affected
  dsa · node-undici · debian · 13
- 9.2.1~7.3.0+dfsg1+~cs24.12.11-1 · arm64 · trixie
  Affected
  dsa · node-undici · debian · 13
[libllhttp-dev]Unknown
Source package: [node-undici]
Details (2)
- 9.2.1~7.3.0+dfsg1+~cs24.12.11-1 · amd64 · trixie
  Affected
  dsa · node-undici · debian · 13
- 9.2.1~7.3.0+dfsg1+~cs24.12.11-1 · arm64 · trixie
  Affected
  dsa · node-undici · debian · 13
[node-llhttp]Unknown
Source package: [node-undici]
Details (2)
- 9.2.1~7.3.0+dfsg1+~cs24.12.11-1 · all · trixie
  Affected
  dsa · node-undici · debian · 13
- 9.2.1~7.3.0+dfsg1+~cs24.12.11-1 · all · trixie
  Affected
  dsa · node-undici · debian · 13
[node-undici]Unknown
Details (2)
- 7.3.0+dfsg1+~cs24.12.11-1 · all · trixie
  Affected
  dsa · node-undici · debian · 13
- 7.3.0+dfsg1+~cs24.12.11-1 · all · trixie
  Affected
  dsa · node-undici · debian · 13

[openSUSE Tumbleweed]

[corepack24]Unknown
Source package: [nodejs24]
Details (1)
- 24.18.1-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 24.13.0-2.1
  Version impact unknown
  dsa · nodejs24 · opensuse · tumbleweed
[nodejs24]Unknown
Source package: [nodejs24]
Details (1)
- 24.18.1-1.1 · x86_64 · tumbleweed
  Fixed · Fixed: 24.13.0-2.1
  dsa · nodejs24 · opensuse · tumbleweed
[nodejs24-devel]Unknown
Source package: [nodejs24]
Details (1)
- 24.18.1-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 24.13.0-2.1
  Version impact unknown
  dsa · nodejs24 · opensuse · tumbleweed
[nodejs24-docs]Unknown
Source package: [nodejs24]
Details (1)
- 24.18.1-1.1 · noarch · tumbleweed
  Unknown · Fixed: 24.13.0-2.1
  Version impact unknown
  dsa · nodejs24 · opensuse · tumbleweed
[npm24]Unknown
Source package: [nodejs24]
Details (1)
- 24.18.1-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 24.13.0-2.1
  Version impact unknown
  dsa · nodejs24 · opensuse · tumbleweed

Observed: Oct 24, 2026, 2:01:06 AM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]