Vulnerability · Published Oct 6, 2026 · Assigned by GitHub_M
CVE-2026-105801openapi-python-client: Malicious OpenAPI Documents can cause Arbitrary Code Generation
High 8.4
In plain English
A high-severity code injection in openapi-python-client from openapi-generators. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
openapi-python-client generates Python clients from OpenAPI documents. Prior to 0.29.1, the generator does not safely neutralize malicious OpenAPI document content before rendering string, docstring, and f-string contexts in generated Python. The generated Python client can contain attacker-controlled Python that executes when a user imports the client, affecting the importing environment's integrity and potentially its confidentiality and availability. This issue is fixed in version 0.29.1.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | openapi-python-client | 0.29.1 | GHSA-5293-mq8x-g3xj |
| PyPI | openapi-python-client | 0.29.1 | PYSEC-2026-4245 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| openapi-generators | openapi-python-client | < 0.29.1 |
Weakness: CWE-94, CWE-116, CWE-150 · Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:H/SI:H/SA:H
References
- https://github.com/openapi-generators/openapi-python-client/security/advisories/GHSA-5293-mq8x-g3xj x_refsource_CONFIRM
- https://github.com/openapi-generators/openapi-python-client/pull/1483 x_refsource_MISC
- https://github.com/openapi-generators/openapi-python-client/commit/1c99af478892e5bbe6583b92acba431c9dec9186 x_refsource_MISC
- https://github.com/openapi-generators/openapi-python-client/releases/tag/v0.29.1 x_refsource_MISC