CVE-2026-55865 | Python Liquid is a Python engine for the Liquid template lan… | CVSS 7.1 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.

Metadata

CVE ID: CVE-2026-55865
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-06-17 16:44 UTC
Published: 2026-07-09 20:34 UTC
Last updated: 2026-07-09 20:34 UTC
Primary CWE: CWE-835
CWE-835: Loop with Unreachable Exit Condition ('Infinite Loo…
Vendor / Product: jg-rp / liquid
Sources: cve.org · NVD

Severity & Metrics

7.1 HIGH CVSS 4.0

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Affected products (1)

Vendor	Product	Platform	Versions
jg-rp	liquid	—	< 2.2.1

Weakness (CWE)

CWE	Source	Description
CWE-835	cna	CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')

CVSS scores (1)

Score	Severity	Version	Source	Vector
7.1	HIGH	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

References (3)

https://github.com/jg-rp/liquid/security/advisories/GHSA-vq2f-vcc9-j8mv https://github.com/jg-rp/liquid/security/advisories/GHSA-vq2f-vcc9-j8mv
https://github.com/jg-rp/liquid/commit/26db8931cf35e8433c1ca506fc32c3bb62f743d4 https://github.com/jg-rp/liquid/commit/26db8931cf35e8433c1ca506fc32c3bb62f743d4
https://github.com/jg-rp/liquid/releases/tag/v2.2.1 https://github.com/jg-rp/liquid/releases/tag/v2.2.1