How severe is CVE-2026-105801?

No CVSS score has been assigned to CVE-2026-105801 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2026-105801?

CVE-2026-105801 affects the following packages: openapi-python-client (PyPI). Ecosystems affected: PyPI.

How do I fix CVE-2026-105801?

Update openapi-python-client to 0.29.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-105801 is resolved across your whole dependency graph.

How do I detect CVE-2026-105801 in my PyPI dependencies?

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.

How do I mitigate CVE-2026-105801 if there is no patch (or I can't update yet)?

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.

Is CVE-2026-105801 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-105801 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2026-105801?

CVE-2026-105801 has an EPSS (Exploit Prediction Scoring System) score of 0.1%, placing it in the 3th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2026-105801?

CVE-2026-105801 is classified as Code Injection (CWE-94), CWE-116 (CWE-116), CWE-150 (CWE-150). These weakness types describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2026-105801 published, and has it been updated?

CVE-2026-105801 was published on October 6, 2026 and was last updated on October 21, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐍 PyPI

Not in CISA KEV

CVE-2026-105801 — openapi-python-client

Fix: openapi-generators/openapi-python-client@1c99af4

CVE-2026-105801 is a Code Injection vulnerability in openapi-python-client. A fix is available for openapi-python-client — see the affected versions and patch details below.

openapi-python-client: Malicious OpenAPI Documents can cause Arbitrary Code Generation

Also known asGHSA-5293-mq8x-g3xjPYSEC-2026-4245

Published

Oct 6, 2026

Updated

Oct 21, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Oct 23, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
A successful exploit gives an attacker total control of the affected component, not partial access.
CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-105801.

EPSS Exploitation Probability

via FIRST.org ↗

0.1%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs3th percentile — riskier than 3% of all scored CVEsHighest risk

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

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

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.

Patches

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.

Workarounds

Do not generate clients for documents you don't completely trust. Carefully verify any existing generated code from untrusted documents.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐍PyPI	`openapi-python-client`	all versions	0.29.1`pip install --upgrade 'openapi-python-client==0.29.1'`

Detection & mitigation playbook

Open-source dependency

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.
Fix
Update openapi-python-client to 0.29.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-105801 is resolved across your whole dependency graph.
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 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. ### Patches 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. ### Workarounds Do not generate clients for documents you don't completely trust. Carefully verify any existing generated code from untrusted documents.

O3 Security · Impact-Aware SCA

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