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Advisory record · GHSA-5293-mq8x-g3xj

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

CVSS 8.4 HighEPSS 0.0014 · 3rd percentile

Published by the GitHub Advisory Database at 6 Oct 2026, 15:32 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
openapi-python-clientPyPI<0.29.10.29.1
Identifiers
GHSA-5293-mq8x-g3xj · CVE-2026-105801 · PYSEC-2026-4245
Weakness (CWE)
CWE-94 · CWE-116 · CWE-150
Tags
Published
6 Oct 2026
Updated
15 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

openapi-python-client versions before 0.29.1 can generate arbitrary Python code when processing a malicious OpenAPI document, and that code runs when the generated client is imported. An attacker who can supply the OpenAPI document to be processed can thereby execute code in the context of anyone who imports the resulting client. Upgrade to version 0.29.1 or later, and audit any code previously generated from untrusted documents.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.4 High 4.0 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 CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0014, the 3rd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:08 UTC First seen by agentprime
  2. 31 Oct 2026, 14:08 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.