Path Traversal in openapi-python-client

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

2.1 · CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N · score source

EPSS

• CVE-2020-15141: 1.14% estimated exploitation activity in the next 30 days; percentile 66.59 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Impact Path traversal vulnerability. If a user generated a client using a maliciously crafted OpenAPI document, it is possible for generated files to be placed in arbitrary locations on disk. Giving this a CVSS score of 3.0 (Low) with CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:N/E:P/RL:U/RC:C Patches A fix is being worked on for version 0.5.3 Workarounds Inspect OpenAPI documents before generating clients for them. For more information If you have any questions or comments about this advisory: Open an issue in openapi-python-client Email us at danthony@triaxtec.com

Published by the source

20 Aug 2020, 14:38 UTC

Last modified by the source

10 Sep 2026, 03:48 UTC

Source last checked

26 Oct 2026, 13:21 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-7wgr-7666-7pwj

2. Revision 2 · amended · 25 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-7wgr-7666-7pwj

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# Patch Next advisory brief: CVE-2020-15141

Advisory: Path Traversal in openapi-python-client
IDs: CVE-2020-15141, GHSA-7wgr-7666-7pwj
Record: https://patchnext.com/advisories/cve-2020-15141 (revision 3, source checked 26 Oct 2026, 13:21 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Low (CVSS 2.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: openapi-python-client 0.5.3. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI openapi-python-client: affected < 0.5.3; fixed in 0.5.3

## Suggested inspection (read-only)
- `python -m pip show openapi-python-client`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on openapi-python-client.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-7wgr-7666-7pwj (OSV record GHSA-7wgr-7666-7pwj lists affected ranges: PyPI openapi-python-client >=0 <0.5.3 (fixed))
- Verified: https://github.com/advisories/GHSA-7wgr-7666-7pwj (GitHub-reviewed advisory GHSA-7wgr-7666-7pwj lists affected ranges: PyPI openapi-python-client >=0 <0.5.3)

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