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CVE-2026-55865

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:0e9a50b81c2c8b5e0565ed0daa7fbfed96ec95890220de88199c799d8560242e
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"liquid","vendor":"jg-rp","versions":[{"status":"affected","version":"< 2.2.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:8beb64e322330b85c424bcc6829410e827c2ad52804c662e10ea11126fe3c6af · sha256:b24392a9aa07bcec… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":7.1,"baseSeverity":"HIGH","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:8beb64e322330b85c424bcc6829410e827c2ad52804c662e10ea11126fe3c6af · sha256:b24392a9aa07bcec… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-835","description":"CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:8beb64e322330b85c424bcc6829410e827c2ad52804c662e10ea11126fe3c6af · sha256:b24392a9aa07bcec… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/jg-rp/liquid/commit/26db8931cf35e8433c1ca506fc32c3bb62f743d4","tags":["x_refsource_MISC"],"url":"https://github.com/jg-rp/liquid/commit/26db8931cf35e8433c1ca506fc32c3bb62f743d4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8beb64e322330b85c424bcc6829410e827c2ad52804c662e10ea11126fe3c6af · sha256:b24392a9aa07bcec… · /containers/cna/references/1
{"name":"https://github.com/jg-rp/liquid/releases/tag/v2.2.1","tags":["x_refsource_MISC"],"url":"https://github.com/jg-rp/liquid/releases/tag/v2.2.1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8beb64e322330b85c424bcc6829410e827c2ad52804c662e10ea11126fe3c6af · sha256:b24392a9aa07bcec… · /containers/cna/references/2
{"name":"https://github.com/jg-rp/liquid/security/advisories/GHSA-vq2f-vcc9-j8mv","tags":["x_refsource_CONFIRM"],"url":"https://github.com/jg-rp/liquid/security/advisories/GHSA-vq2f-vcc9-j8mv"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8beb64e322330b85c424bcc6829410e827c2ad52804c662e10ea11126fe3c6af · sha256:b24392a9aa07bcec… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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