PYSEC-2026-3035 Python Liquid: Infinite loop when parsing malformed `{% case %}` tags

Impact Given a malformed % case % tag without associated % when % or % else % block, and no terminating % endcase % tag, Python Liquid hangs in an infinite loop at parse time. This allows malicious template authors to craft templates for a denial of service attack. Patches The issue is fixed in...

PT-2026-51120

Name of the Vulnerable Software and Affected Versions Python Liquid versions prior to 2.2.1 Description A denial of service issue exists where the engine hangs in an infinite loop during parse time. This occurs when a malformed % case % tag is used without an associated % when % or % else % block...