{"id":"USN-6424-1","summary":"ruby-kramdown vulnerability","details":"It was discovered that kramdown did not restrict Rouge formatters to the\ncorrect namespace. An attacker could use this issue to cause kramdown to\nexecute arbitrary code.\n","modified":"2026-02-10T04:43:22Z","published":"2023-10-10T04:39:08Z","related":["UBUNTU-CVE-2021-28834"],"upstream":["CVE-2021-28834","UBUNTU-CVE-2021-28834"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6424-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-28834"}],"affected":[{"package":{"name":"ruby-kramdown","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/ruby-kramdown@1.17.0-4ubuntu0.2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.17.0-4ubuntu0.2"}]}],"versions":["1.17.0-1","1.17.0-2","1.17.0-4","1.17.0-4ubuntu0.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1.17.0-4ubuntu0.2","binary_name":"kramdown"},{"binary_version":"1.17.0-4ubuntu0.2","binary_name":"ruby-kramdown"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:20.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-28834"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6424-1.json"}}],"schema_version":"1.7.3"}