{"id":"CVE-2023-26303","summary":"markdown-it-py crash on null assertions","details":"Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.","aliases":["GHSA-vrjv-mxr7-vjf8","PYSEC-2023-24"],"modified":"2026-05-18T05:55:23.596418603Z","published":"2023-02-22T23:44:40.711Z","related":["openSUSE-SU-2024:12772-1"],"database_specific":{"cwe_ids":["CWE-173"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/26xxx/CVE-2023-26303.json","cna_assigner":"canonical"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/26xxx/CVE-2023-26303.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-26303"},{"type":"FIX","url":"https://github.com/executablebooks/markdown-it-py/commit/ae03c6107dfa18e648f6fdd1280f5b89092d5d49"},{"type":"PACKAGE","url":"https://github.com/executablebooks/markdown-it-py"},{"type":"PACKAGE","url":"https://github.com/executablebooks/markdown-it-py/releases"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/executablebooks/markdown-it-py","events":[{"introduced":"0"},{"fixed":"73a01479212bfe2aea0b995b4d13c8ddca2e4265"}]}],"versions":["v2.1.0","v2.0.1","v2.0.0","v1.1.0","v1.0.0","v1.0.0b3","v1.0.0b2","v1.0.0b1","v0.6.2","v0.6.1","v0.6.0","v0.5.8","v0.5.7","v0.5.6","v0.5.5","v0.5.4","v0.5.3","v0.5.2","v0.5.1","v0.5.0","v0.4.9","v0.4.8","v0.4.7","v0.4.6","v0.4.5","v0.4.4","v0.4.3","v0.4.2","v0.4.1","v0.4.0","v0.3.3","v0.3.2","v0.3.1","v0.3.0","v0.2.3","v0.2.2","v0.2.1","v0.2.0","v0.1.1d","v0.1.1c","v0.1.1b","v0.1.1a","v0.1.1","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-26303.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"}]}