Summary
openapi-python-client: Malicious OpenAPI Documents can cause Arbitrary Code Generation
Workarounds
Do not generate clients for documents you don't completely trust. Carefully verify any existing generated code from untrusted documents.
Impact
A malicious OpenAPI document processed by any openapi-python-client prior to 0.29.1 can generate arbitrary Python code. When anyone imports the malicious client, that arbitrary Python code will execute.
Untrusted input is evaluated as executable code within the application's runtime environment. Typical impact: arbitrary code execution within the application's privilege context.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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Versions starting with 0.29.1 have updated with guardrails to prevent arbitrary code generation. Upgrade to this version immediately and audit any code previously generated from untrusted documents.
Frequently Asked Questions
- What is CVE-2026-105801? CVE-2026-105801 is a high-severity code injection vulnerability in openapi-python-client (pip), affecting versions < 0.29.1. It is fixed in 0.29.1. Untrusted input is evaluated as executable code within the application's runtime environment.
- Which versions of openapi-python-client are affected by CVE-2026-105801? openapi-python-client (pip) versions < 0.29.1 is affected.
- Is there a fix for CVE-2026-105801? Yes. CVE-2026-105801 is fixed in 0.29.1. Upgrade to this version or later.
- Is CVE-2026-105801 exploitable, and should I be worried? Whether CVE-2026-105801 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2026-105801 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2026-105801? Upgrade
openapi-python-clientto 0.29.1 or later.