{"id":"UBUNTU-CVE-2026-46338","details":"PyMdown Extensions is a set of extensions for the Python-Markdown markdown project. From 10.0.1 until 10.21.3, pymdownx.snippets uses a string-prefix containment check in SnippetPreprocessor.get_snippet_path() in pymdownx/snippets.py when `restrict_base_path: True`, allowing markdown snippet directives to read files from sibling paths that share the same base_path prefix, such as docs and docs_internal. This is a regression of CVE-2023-32309. This issue is fixed in version 10.21.3.","modified":"2026-07-29T07:58:04Z","published":"2026-07-16T19:16:00Z","upstream":["CVE-2026-46338"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-46338"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-46338"},{"type":"REPORT","url":"https://github.com/facelessuser/pymdown-extensions/commit/63b7835776d703d6c339cf2110d9888f676efc0c"},{"type":"REPORT","url":"https://github.com/facelessuser/pymdown-extensions/releases/tag/10.21.3"},{"type":"REPORT","url":"https://github.com/facelessuser/pymdown-extensions/security/advisories/GHSA-62q4-447f-wv8h"}],"affected":[{"package":{"name":"pymdown-extensions","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/pymdown-extensions?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.5-2","9.5-4","9.5-5"],"ecosystem_specific":{"binaries":[{"binary_version":"9.5-5","binary_name":"python3-pymdownx"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-46338.json"}},{"package":{"name":"pymdown-extensions","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/pymdown-extensions?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["10.13-3","10.13-4","10.19.1-3"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-pymdownx","binary_version":"10.19.1-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-46338.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}