CVE-2026-55865 — Python Liquid: Infinite loop when parsing malformed `{% case %}` tags
Python Liquid is a Python engine for the Liquid template language. Prior to 2.2.1, given a malformed {% case %} tag without an associated {% when %} or {% else %} block and no t…
Published: 2026-07-09 · CVSS: 7.1 · CVSS 4.0
Python Liquid is a Python engine for the Liquid template language. Prior to 2.2.1, given a malformed {% case %} tag without an associated {% when %} or {% else %} block and no terminating {% endcase %} tag, Python Liquid hangs in an infinite loop at parse time because liquid.TokenStream.eof did not give the EOF token matching kind and value fields, allowing malicious template authors to craft templates for a denial of service attack. This issue is fixed in version 2.2.1.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7