PyPI/orjson CVE-2025-67221: high 7.5, EPSS 0.63%

The orjson.dumps function in orjson thru 3.11.4 does not limit recursion for deeply nested JSON documents.

Action: Upgrade orjson to 3.11.5 or later.

pip install orjson==3.11.5

Affected

Fixed versions

Sources

• osv: PYSEC-2026-107
• https://github.com/ijl/orjson
• https://github.com/kpatsakis/orjson_vulnerability
• https://github.com/advisories/GHSA-hx9q-6w63-j58v

CVE-2025-67221 · published 2026-01-22T17:16:01.433Z · modified 2026-06-10T17:02:27.794281728Z · JSON