CVE-2025-67221

orjson: orjson: Denial of Service due to unbounded recursion with deeply nested JSON documents

Published Jan 22, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Description
The orjson.dumps function in orjson thru 3.11.4 does not limit recursion for deeply nested JSON documents.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-hx9q-6w63-j58v orjson does not limit recursion for deeply nested JSON documents
History
Type Values Removed Values Added
CPEs cpe:2.3:a:ijl:orjson:*:*:*:*:*:python:*:*
Type Values Removed Values Added
Title orjson: orjson: Denial of Service due to unbounded recursion with deeply nested JSON documents
References
Type Values Removed Values Added
First Time appeared Ijl
Ijl orjson
Vendors & Products Ijl
Ijl orjson
Type Values Removed Values Added
Description The orjson.dumps function in orjson thru 3.11.4 does not limit recursion for deeply nested JSON documents.
Weaknesses CWE-770
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Jan 22, 2026, 5:05 PM
Reserved
Dec 8, 2025, 12:00 AM
Status
Analyzed
Published
Jan 22, 2026, 5:16 PM
Modified
Jun 17, 2026, 9:57 AM
Severity
Public date
Jan 22, 2026, 12:00 AM