Security Bulletin:Mako Template Library Vulnerability: Backslash Traversal on Windows Prior to Version 1.3.12

Summary Mako is a template library written in Python. Prior to 1.3.12, on Windows, a URI using backslash traversal e.g. \..\..\ secret.txt bypasses the directory traversal check in Template.init and the posixpath-based normalization in TemplateLookup.gettemplate, allowing reads of files outside...

CVE-2026-44307

A flaw was found in Mako, a Python template library. A remote attacker could exploit a directory traversal vulnerability by crafting a Uniform Resource Identifier URI with backslash traversal. This bypasses security checks, allowing the attacker to read files outside the intended template...

CVE-2026-44307

Mako is a template library written in Python. Prior to 1.3.12, on Windows, a URI using backslash traversal e.g. ....\ secret.txt bypasses the directory traversal check in Template.init and the posixpath-based normalization in TemplateLookup.gettemplate, allowing reads of files outside the...

CVE-2026-44307 Mako: Path traversal via backslash URI on Windows in TemplateLookup

Mako is a template library written in Python. Prior to 1.3.12, on Windows, a URI using backslash traversal e.g. ....\ secret.txt bypasses the directory traversal check in Template.init and the posixpath-based normalization in TemplateLookup.gettemplate, allowing reads of files outside the...

CVE-2026-44307 Mako: Path traversal via backslash URI on Windows in TemplateLookup

Mako is a template library written in Python. Prior to 1.3.12, on Windows, a URI using backslash traversal e.g. ....\ secret.txt bypasses the directory traversal check in Template.init and the posixpath-based normalization in TemplateLookup.gettemplate, allowing reads of files outside the...

CVE-2026-41205

Mako is a template library written in Python. Prior to 1.3.11, TemplateLookup.gettemplate 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...

EUVD-2026-25279

Mako is a template library written in Python. Prior to 1.3.11, TemplateLookup.gettemplate 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...

CVE-2026-41205

Mako is a template library written in Python. Prior to 1.3.11, TemplateLookup.gettemplate 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...