CVE-2026-55865
High
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.
SeverityHigh
CVSS7.1
Exploit probability—
ProductPython-liquid
PublishedJul 9, 2026
First seenJul 9, 2026
Weakness typeCWE-835CWE-835
How to fix
Update
- python-liquid2.2.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| python-liquidPyPI | v < 2.2.1 | 2.2.1 |
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