{"id":"DEBIAN-CVE-2020-5238","details":"The table extension in GitHub Flavored Markdown before version 0.29.0.gfm.1 takes O(n * n) time to parse certain inputs. An attacker could craft a markdown table which would take an unreasonably long time to process, causing a denial of service. This issue does not affect the upstream cmark project. The issue has been fixed in version 0.29.0.gfm.1.","modified":"2026-09-11T11:02:38.833272086Z","published":"2020-07-01T23:15:10.443Z","upstream":["CVE-2020-5238"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2020-5238"}],"affected":[{"package":{"name":"cmark-gfm","ecosystem":"Debian:12","purl":"pkg:deb/debian/cmark-gfm?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.29.0.gfm.2-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-5238.json"}},{"package":{"name":"cmark-gfm","ecosystem":"Debian:13","purl":"pkg:deb/debian/cmark-gfm?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.29.0.gfm.2-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-5238.json"}},{"package":{"name":"cmark-gfm","ecosystem":"Debian:14","purl":"pkg:deb/debian/cmark-gfm?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.29.0.gfm.2-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-5238.json"}},{"package":{"name":"haskell-cmark-gfm","ecosystem":"Debian:12","purl":"pkg:deb/debian/haskell-cmark-gfm?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.2.1+ds1-1"}]}],"ecosystem_specific":{"urgency":"not yet 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assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-5238.json"}},{"package":{"name":"ruby-commonmarker","ecosystem":"Debian:12","purl":"pkg:deb/debian/ruby-commonmarker?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.21.0-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-5238.json"}},{"package":{"name":"ruby-commonmarker","ecosystem":"Debian:13","purl":"pkg:deb/debian/ruby-commonmarker?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.21.0-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-5238.json"}},{"package":{"name":"ruby-commonmarker","ecosystem":"Debian:14","purl":"pkg:deb/debian/ruby-commonmarker?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.21.0-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-5238.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}