{"schema_version":"1.9.0","id":"GHSA-9w8r-397f-prfh","published":"2021-04-20T16:35:47Z","modified":"2024-10-14T18:43:36.784789Z","aliases":["CVE-2021-20270","PYSEC-2021-140"],"summary":"Infinite Loop in Pygments","details":"An infinite loop in SMLLexer in Pygments versions 1.5 to 2.7.3 may lead to denial of service when performing syntax highlighting of a Standard ML (SML) source file, as demonstrated by input that only contains the \"exception\" keyword.","affected":[{"package":{"name":"pygments","ecosystem":"PyPI","purl":"pkg:pypi/pygments"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.5"},{"fixed":"2.7.4"}]}],"versions":["1.5","1.6","1.6rc1","2.0","2.0.1","2.0.2","2.0rc1","2.1","2.1.1","2.1.2","2.1.3","2.2.0","2.3.0","2.3.1","2.4.0","2.4.1","2.4.2","2.5.1","2.5.2","2.6.0","2.6.1","2.7.0","2.7.1","2.7.2","2.7.3"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/04/GHSA-9w8r-397f-prfh/GHSA-9w8r-397f-prfh.json"}}],"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20270"},{"type":"WEB","url":"https://github.com/pygments/pygments/commit/f91804ff4772e3ab41f46e28d370f57898700333"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1922136"},{"type":"PACKAGE","url":"https://github.com/pygments/pygments"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/pygments/PYSEC-2021-140.yaml"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2021/05/msg00003.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2021/05/msg00006.html"},{"type":"WEB","url":"https://www.debian.org/security/2021/dsa-4889"},{"type":"WEB","url":"https://www.oracle.com/security-alerts/cpuoct2021.html"}],"database_specific":{"cwe_ids":["CWE-835"],"github_reviewed":true,"github_reviewed_at":"2021-04-12T20:58:03Z","nvd_published_at":"2021-03-23T17:15:00Z","severity":"HIGH"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}