CVE-2026-55390: koxudaxi datamodel-code-generator path traversal in XML Schema parsing

CVE-2026-55390 · Severity: high · CVSS 7.5 · Published 2026-07-28

datamodel-code-generator is a tool used to automatically create Python code from data schema definitions. A security flaw in how it handles XML schemas allows an attacker to provide a malicious schema file that forces the tool to read sensitive files from the local system, such as configuration files or other source code. If this tool is used in an automated pipeline or a shared service, an attacker could steal private information by having it included in the generated code output.

Technologies: Koxudaxi Datamodel-Code-Generator, datamodel-code-generator (PyPI). Vendors: Koxudaxi, PyPI.

Quick answers

Is CVE-2026-55390 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-55390 being exploited in the wild.
How severe is CVE-2026-55390?
High severity, with a CVSS score of 7.5, published 28 July 2026.
Which products and versions are affected?
Koxudaxi Datamodel-Code-Generator >= 0.59.0, < 0.62.0, >= 0.59.0, <= 0.61.0; datamodel-code-generator (PyPI) ECOSYSTEM:introduced=0.59.0,fixed=0.62.0.
Is there a fix for CVE-2026-55390?
Yes. datamodel-code-generator (PyPI): upgrade to 0.62.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-55390 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-55390?
Check whether you run Koxudaxi Datamodel-Code-Generator or datamodel-code-generator (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • datamodel-code-generator (PyPI): upgrade to 0.62.0 or later
    pip install "datamodel-code-generator>=0.62.0"

Technical details

A path traversal vulnerability exists in the XML Schema (XSD) parser of datamodel-code-generator within `src/datamodel_code_generator/parser/xmlschema.py`. The parser fails to validate that `schemaLocation` attributes in `xs:include`, `xs:import`, `xs:redefine`, and `xs:override` tags remain within the input base directory. By using `../` sequences or absolute paths, an attacker can force the application to read arbitrary local files that the process has permissions to access. If the target file contains XML-structured data, its contents may be reflected in the generated Python models. This issue is reachable in the default configuration and is not mitigated by the `--no-allow-remote-refs` flag. The vulnerability was introduced in version 0.59.0 and is fixed in version 0.62.0 by enforcing that all resolved paths are relative to the base input directory.

Affected products

  • koxudaxi datamodel-code-generator >= 0.59.0, < 0.62.0

Identifiers

  • CVE-2026-55390
  • GHSA-442q-2j6p-642g
  • PYSEC-2026-3556

Timeline

  • 2026-06-10: patched: Version 0.62.0 released
  • 2026-06-12: advisory: GitHub Security Advisory published
  • 2026-07-28: disclosed: CVE published to NVD

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.