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CVE-2025-67221PYSEC-2026-107GHSA-HX9Q-6W63-J58V

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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 3.11.5, 3.11.6
1 proof of concept on GitHub
  • Exploitation: poc
  • Automatable: yes
  • Technical impact: partial

Summary

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

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: poc · Automatable: yes · Technical impact: partial

  3. Record last updated

Affected versions

  • n/a n/a

    Version range not reported

  • orjsonPyPI

    fixed in 3.11.5

  • orjsonPyPI

    fixed in 3.11.6

References 3

GitHub · kpatsakis/orjson_vulnerability

GitHub · ijl/orjson

GitHub · kpatsakis/CVE-2025-67221