CVE-2026-54656
`datamodel-code-generator` vulnerable to code execution on import via unescaped `validators` entries in --extra-template-data
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
datamodel-code-generator generates Pydantic v2 models, dataclasses, TypedDict, and msgspec.Struct from OpenAPI, JSON Schema, GraphQL, Avro, Protobuf, and raw JSON, YAML, or CSV. From 0.52.1 until 0.60.2, datamodel-code-generator interpolates validators from --extra-template-data in src/datamodel_code_generator/model/pydantic_v2/base_model.py through _process_validators into @field_validator decorators without safe validation, allowing Python code execution when the generated Pydantic v2 model is imported. This issue is fixed in version 0.60.2.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.25% · top 83% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
koxudaxi · datamodel-code-generator
- affected >= 0.52.1, < 0.60.2
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- PyPIdatamodel-code-generatorGHSA-8m8r-38jm-f355 (opens in a new tab)
References (3)
- https://github.com/koxudaxi/datamodel-code-generator/security/advisories/GHSA-8m8r-38jm-f355 (opens in a new tab)x_refsource_CONFIRMexploit
- https://github.com/koxudaxi/datamodel-code-generator/commit/a43d02906111a2fdcaf13ee5b62eb2da85376f19 (opens in a new tab)x_refsource_MISC
- https://github.com/koxudaxi/datamodel-code-generator/releases/tag/0.60.2 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-8m8r-38jm-f355 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-54656)Record last updated .