CVE-2026-105801 openapi-python-client: Malicious OpenAPI Documents can cause Arbitrary Code Generation
Attackers can inject arbitrary Python code into generated clients via malicious OpenAPI documents, leading to code execution when the client is imported.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-105801?
CVE-2026-105801 is a high-severity code injection vulnerability in openapi-generators openapi-python-client, published on 6 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
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.
Which versions are affected by CVE-2026-105801?
3 open source packages ship an affected version, including openapi-python-client.
| Package | Affected | Fixed in |
|---|---|---|
openapi-python-client PyPI | All versions | 0.29.1 |
openapi-python-client PyPI | All versions | 0.29.1 |
openapi-python-client PyPI | All versions | 0.29.1 |
How do I fix CVE-2026-105801?
Upgrade openapi-python-client to 0.29.1 or later.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-105801 being exploited?
There is no known exploitation of CVE-2026-105801 in the wild and no public exploit code.
Sources
Also known as GHSA-5293-mq8x-g3xj, PYSEC-2026-4245.