GHSA-5578-w22f-pfx9: datamodel-code-generator (CVE-2026-55415)

Package	Ecosystem	Affected	Fixed in
datamodel-code-generator	PyPI	>=0.11.6, <0.64.0	0.64.0

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

datamodel-code-generator versions >=0.11.6 and <0.64.0 are vulnerable to code injection through the x-python-import and customTypePath schema extensions, which are written unsanitized into generated import statements. An attacker who supplies a malicious OpenAPI or JSON Schema document with a newline in these values can get arbitrary Python code to run when the generated module is imported, with no authentication needed. Upgrade to version 0.64.0, which contains the fix. Until then, avoid generating models from untrusted schemas.

Written 5 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.5	High	3.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0049, the 42nd percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:35 UTC First seen by agentprime
31 Oct 2026, 14:35 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.