What is the CVSS score of CVE-2025-67221?

CVE-2025-67221 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.1%.

Which versions of Orjson are affected by CVE-2025-67221?

CVE-2025-67221 affects the orjson library (versions through 3.11.4) and could allow attackers to crash applications or consume excessive resources through deeply nested JSON payloads.. A patch is available.

Is there a public PoC exploit available for CVE-2025-67221?

Yes, a public proof-of-concept exploit is available for CVE-2025-67221. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-67221?

Within 24 hours: Inventory all applications and services using orjson library and document versions in use. Within 7 days: Implement input validation to reject JSON documents exceeding a reasonable nesting depth threshold, and deploy monitoring for recursion-related errors or performance degradation. Within 30 days: Evaluate alternative JSON libraries or apply vendor patches once released, and conduct testing to validate mitigation effectiveness.

Orjson CVE-2025-67221

HIGH

Allocation of Resources Without Limits or Throttling (CWE-770)

2026-01-22 cve@mitre.org

GHSA-hx9q-6w63-j58v

Denial Of Service Orjson Red Hat Suse

7.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SUSE

HIGH

qualitative

Primary rating from NVD.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Feb 12, 2026 - 15:03 vuln.today

Public exploit code

CVE Published

Jan 22, 2026 - 17:16 nvd

HIGH 7.5

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

2 pypi packages depend on orjson (2 direct, 0 indirect)

Ecosystem-wide dependent count for version 3.11.6.

DescriptionCVE.org

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

AnalysisAI

The orjson.dumps function in orjson thru 3.11.4 does not limit recursion for deeply nested JSON documents. [CVSS 7.5 HIGH]

Technical ContextAI

Classified as CWE-770 (Allocation of Resources Without Limits or Throttling). Affects Orjson. The orjson.dumps function in orjson thru 3.11.4 does not limit recursion for deeply nested JSON documents.

RemediationAI

Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.

Vendor StatusVendor

SUSE

Severity: High

Product	Status
SUSE Linux Enterprise Server 16.0 SUSE Linux Enterprise Server for SAP applications 16.0	Fixed
openSUSE Leap 16.0	Fixed
openSUSE Tumbleweed	Fixed
SUSE Linux Enterprise Server 16.0	Affected
SUSE Linux Enterprise Server 16.0	Fixed

CVE-2025-67221 vulnerability details – vuln.today

Back

SUSE Linux Enterprise Server 16.1	Fixed
SUSE Linux Enterprise Server for SAP applications 16.0	Fixed
SUSE Linux Enterprise Server for SAP applications 16.1	Fixed

Orjson CVE-2025-67221

Severity by source

CVSS VectorNVD

Lifecycle Timeline

Blast Radius

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

Vendor StatusVendor

SUSE

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External POC / Exploit Code