Your RSA-2048 keys break in 2030. Find every one of them before attackers do.
🐍
🐍 PyPI
Not in CISA KEV
HIGH severity

openapi-python-client Arbitrary Code Generation vulnerabilityGHSA-9x4c-63pf-525f

HIGHFix: openapi-generators/openapi-python-client@f7a56aa

GHSA-9x4c-63pf-525f is a high-severity (CVSS 8) Code Injection vulnerability in openapi-python-client. A fix is available for openapi-python-client — see the affected versions and patch details below.

Also known asCVE-2020-15142PYSEC-2020-71
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Sep 28, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.8%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs78th percentile — riskier than 78% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

GHSA-9x4c-63pf-525f by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 394,803 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected
🐍openapi-python-client

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

Impact

Clients generated with a maliciously crafted OpenAPI Document can generate arbitrary Python code. Subsequent execution of this malicious client is arbitrary code execution.

Giving this a CVSS of 8.0 (high) with CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H/E:P/RL:U/RC:C .

Patches

Fix will be included in version 0.5.3

Workarounds

Inspect OpenAPI documents before generating, or inspect generated code before executing.

For more information

If you have any questions or comments about this advisory:

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPIopenapi-python-clientall versions0.5.3pip install --upgrade 'openapi-python-client==0.5.3'

Affected Products

1 product · 1 configurations
Application
openapi-python-clientopenapi-python-client_project
< 0.5.3
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for openapi-python-client, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update openapi-python-client to 0.5.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-9x4c-63pf-525f is resolved across your whole dependency graph.

  3. Workarounds

    Stop passing untrusted input into the interpreter or shell: call the affected binary with an argument array rather than a composed command string, reject anything outside a strict allowlist of expected values, and run the component under an account that cannot reach beyond the work it legitimately does.

Frequently Asked Questions

### Impact Clients generated with a maliciously crafted OpenAPI Document can generate arbitrary Python code. Subsequent execution of this malicious client is arbitrary code execution. Giving this a CVSS of 8.0 (high) with CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H/E:P/RL:U/RC:C . ### Patches Fix will be included in version 0.5.3 ### Workarounds Inspect OpenAPI documents before generating, or inspect generated code before executing. ### For more information If you have any questions or comments about this advisory: * Open an issue in [openapi-python-client](https://github.com/triaxtec/ope
O3 Security · Impact-Aware SCA

Is GHSA-9x4c-63pf-525f in your dependencies?

Find it across PyPI, including transitive dependencies.

Scan my dependencies How O3 SCA works
openapi-python-client Arbitrary Code Generation…