{"id":"CVE-2026-41205","aliases":["GHSA-v92g-xgxw-vvmm","PYSEC-2026-88"],"url":"https://o3.security/vulnerability/CVE-2026-41205","summary":"Mako: Path traversal via double-slash URI prefix in TemplateLookup","details":"Mako is a template library written in Python. Prior to 1.3.11, TemplateLookup.get_template() is vulnerable to path traversal when a URI starts with // (e.g., //../../../secret.txt). The root cause is an inconsistency between two slash-stripping implementations. Any file readable by the process can be returned as rendered template content when an application passes untrusted input directly to TemplateLookup.get_template(). This vulnerability is fixed in 1.3.11.","published":"2026-04-23T18:52:24.194Z","modified":"2026-08-07T11:51:03.173071730Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"mako","fixedVersion":"1.3.11"}],"fix":{"url":"https://github.com/sqlalchemy/mako/commit/e05ac61989a7fb9dd7dcde6cfd72dc48328719a3","label":"sqlalchemy/mako@e05ac61"},"references":[{"type":"WEB","url":"https://github.com/sqlalchemy/mako/releases/tag/rel_1_3_11"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41205.json"},{"type":"ADVISORY","url":"https://github.com/sqlalchemy/mako/security/advisories/GHSA-v92g-xgxw-vvmm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41205"},{"type":"FIX","url":"https://github.com/sqlalchemy/mako/commit/e05ac61989a7fb9dd7dcde6cfd72dc48328719a3"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:51:03.173071730Z"}}