CVE-2026-102991

The Mako Python template library is vulnerable to a path traversal flaw on Windows in versions prior to 1.4.2 . The issue stems from a discrepancy where TemplateLookup.get_template() uses posixpath to resolve URIs, while Template.__init__() uses os.path (which utilizes ntpath) for validation. Att...

CVE-2026-102991 Mako: Path traversal via drive-letter URI on Windows in TemplateLookup

Mako is a template library written in Python. Prior to 1.4.2, on Windows, TemplateLookup.gettemplate in mako/lookup.py resolves template URIs with posixpath, while Template.init in mako/template.py validates them with os.path, which uses ntpath. A URI beginning with a drive designator causes ntpa...