# orjson (PyPI) vulnerabilities

2 known vulnerabilities (2 high), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: 3.13.0 (Oct 7, 2026): no advisory affects it
- Newest unaffected release: 3.13.0 (Oct 7, 2026), the latest release
- Weekly downloads: 50.6M
- Dependents: 19.8K
- Releases: 151 since 1.0.0 (Nov 23, 2018)
- Registry: https://pypi.org/project/orjson/
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2025-67221: 1.0.0 to 3.11.5 (3.11.6 is outside it)
- CVE-2024-27454: 1.0.0 to 3.9.14 (3.9.15 is outside it)

## Advisories (2)

### [CVE-2025-67221](https://cve.now/CVE-2025-67221): The orjson.dumps function in orjson thru 3.11.4 does not limit recursion for deeply nested JSON documents.

- Severity: High 7.5
- Published: Jan 22, 2026
- Affected: fixed in 3.11.6; fixed in 3.11.5.
- Fixed in 3.11.6 (released Jan 29, 2026, 7 days after disclosure).
- The latest release, 3.13.0, is not affected.

### [CVE-2024-27454](https://cve.now/CVE-2024-27454): orjson.loads in orjson before 3.9.15 does not limit recursion for deeply nested JSON documents.

- Severity: High 7.5
- Published: Feb 26, 2024
- Affected: fixed in 3.9.15.
- Fixed in 3.9.15 (released Feb 23, 2024, 3 days before disclosure).
- The latest release, 3.13.0, is not affected.

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