Description
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.
Problem types
CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')
Product status
References
github.com/...liquid/security/advisories/GHSA-vq2f-vcc9-j8mv
github.com/...ommit/26db8931cf35e8433c1ca506fc32c3bb62f743d4
github.com/jg-rp/liquid/releases/tag/v2.2.1