{"id":"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.","aliases":["GHSA-7gc6-9qr5-hc85"],"modified":"2026-07-08T05:59:23.490832237Z","published":"2020-07-01T23:15:10.443Z","related":["ALSA-2021:1972"],"database_specific":{"unresolved_ranges":[{"cpes":["cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*","cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*","cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"31"},{"last_affected":"31"},{"introduced":"32"},{"last_affected":"32"},{"introduced":"33"},{"last_affected":"33"}],"source":"CPE_STRING","vendor_product":"fedoraproject:fedora"}]},"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TCDHBTUFIOYRIS5HAS6PZNBNMB7IOAX3/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WMQFOQQCWOAMQ4I2XIVCVOXXIJ75HDCW/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZGJH2A4VAV54X6NSCNNGSEIGIIY5N2VR/"},{"type":"ADVISORY","url":"https://github.com/github/cmark-gfm/security/advisories/GHSA-7gc6-9qr5-hc85"},{"type":"FIX","url":"https://github.com/github/cmark-gfm/commit/85d895289c5ab67f988ca659493a64abb5fec7b4"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/github/cmark-gfm","events":[{"introduced":"0"},{"fixed":"0f98e8abfb65dd7b2a2ae03e46b182b5124e0e34"},{"fixed":"85d895289c5ab67f988ca659493a64abb5fec7b4"}],"database_specific":{"cpe":"cpe:2.3:a:github_flavored_markdown_project:github_flavored_markdown:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"0.29.0.gfm.1"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["0.28.3.gfm.20","0.29.0.gfm.0","0.28.3.gfm.19","0.28.3.gfm.18","0.28.3.gfm.17","0.28.3.gfm.16","0.28.3.gfm.15","0.28.3.gfm.14","0.28.3.gfm.13","0.28.3.gfm.12","0.28.0.gfm.11","0.28.0.gfm.10","0.28.0.gfm.9","0.28.0.gfm.8","0.28.0.gfm.7","0.28.0.gfm.6","0.28.0.gfm.5","0.27.1.gfm.4","0.27.1.gfm.3","0.27.1.gfm.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-5238.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}