{"schema_version":"1.7.3","id":"GHSA-pq64-v7f5-gqh8","published":"2021-03-29T16:33:03Z","modified":"2024-10-14T18:40:16.220059Z","aliases":["CVE-2021-27291","PYSEC-2021-141"],"summary":"Pygments vulnerable to Regular Expression Denial of Service (ReDoS)","details":"In pygments 1.1+, fixed in 2.7.4, the lexers used to parse programming languages rely heavily on regular expressions. Some of the regular expressions have exponential or cubic worst-case complexity and are vulnerable to ReDoS. By crafting malicious input, an attacker can cause a denial of service.","affected":[{"package":{"name":"pygments","ecosystem":"PyPI","purl":"pkg:pypi/pygments"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.1"},{"fixed":"2.7.4"}]}],"versions":["1.1","1.1.1","1.2","1.2.1","1.2.2","1.3","1.3.1","1.4","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/2021/03/GHSA-pq64-v7f5-gqh8/GHSA-pq64-v7f5-gqh8.json"}}],"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27291"},{"type":"WEB","url":"https://github.com/pygments/pygments/commit/2e7e8c4a7b318f4032493773732754e418279a14"},{"type":"WEB","url":"https://gist.github.com/b-c-ds/b1a2cc0c68a35c57188575eb496de5ce"},{"type":"PACKAGE","url":"https://github.com/pygments/pygments"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/pygments/PYSEC-2021-141.yaml"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2021/03/msg00024.html"},{"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://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GSJRFHALQ7E3UV4FFMFU2YQ6LUDHAI55"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WSLD67LFGXOX2K5YNESSWAS4AGZIJTUQ"},{"type":"WEB","url":"https://www.debian.org/security/2021/dsa-4878"},{"type":"WEB","url":"https://www.debian.org/security/2021/dsa-4889"}],"database_specific":{"cwe_ids":["CWE-400"],"github_reviewed":true,"github_reviewed_at":"2021-03-22T20:28:40Z","nvd_published_at":"2021-03-17T13:15:00Z","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"}]}