{"id":"UBUNTU-CVE-2022-21670","details":"markdown-it is a Markdown parser. Prior to version 1.3.2, special patterns with length greater than 50 thousand characterss could slow down the parser significantly. Users should upgrade to version 12.3.2 to receive a patch. There are no known workarounds aside from upgrading.","modified":"2026-05-20T16:07:42.268672301Z","published":"2022-01-10T21:15:00Z","upstream":["CVE-2022-21670"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2022-21670"},{"type":"REPORT","url":"https://github.com/markdown-it/markdown-it/security/advisories/GHSA-6vfc-qv3f-vr6c"},{"type":"REPORT","url":"https://github.com/markdown-it/markdown-it/commit/ffc49ab46b5b751cd2be0aabb146f2ef84986101"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2022-21670"}],"affected":[{"package":{"name":"node-markdown-it","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/node-markdown-it?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["10.0.0+dfsg-2","10.0.0+dfsg-3","10.0.0+dfsg-3.1","10.0.0+dfsg-4","10.0.0+dfsg-5","10.0.0+dfsg-6"],"ecosystem_specific":{"binaries":[{"binary_name":"node-markdown-it","binary_version":"10.0.0+dfsg-6"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2022/UBUNTU-CVE-2022-21670.json"}},{"package":{"name":"node-markdown-it","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/node-markdown-it?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["22.2.3+dfsg+~12.2.3-2"],"ecosystem_specific":{"binaries":[{"binary_name":"node-markdown-it","binary_version":"22.2.3+dfsg+~12.2.3-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2022/UBUNTU-CVE-2022-21670.json"}},{"package":{"name":"node-markdown-it","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/node-markdown-it?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["22.2.3+dfsg+~12.2.3-2"],"ecosystem_specific":{"binaries":[{"binary_name":"node-markdown-it","binary_version":"22.2.3+dfsg+~12.2.3-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2022/UBUNTU-CVE-2022-21670.json"}},{"package":{"name":"node-markdown-it","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/node-markdown-it?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["22.2.3+dfsg+~12.2.3-2","22.2.3+dfsg+~12.2.3-4"],"ecosystem_specific":{"binaries":[{"binary_version":"22.2.3+dfsg+~12.2.3-4","binary_name":"node-markdown-it"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2022/UBUNTU-CVE-2022-21670.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"low"}]}