The orjson.dumps function in orjson thru 3.11.4 does not limit recursion for deeply nested JSON documents.
Priority HIGH 72CWE-770Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 4 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-770.
Summary
The orjson.dumps function in orjson thru 3.11.4 does not limit recursion for deeply nested JSON documents.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00633 50th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial orjson (PyPI): 3.11.6Red Hat: 4 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | orjson (PyPI) | before 3.11.6 | 3.11.6 | Patch available | GHSA-hx9q-6w63-j58v |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- orjson (PyPI) Vendor— Affected before 3.11.6 Fixed in 3.11.6 Patch available GHSA-hx9q-6w63-j58v
Remediation
- Fix · GHSA-hx9q-6w63-j58v orjson (PyPI) Fixed in 3.11.6 Advisory →
Vendor assessments
Red Hat
| Product | Status | Plan or fix |
|---|---|---|
| OpenShift Lightspeed | Affected | No fix yet: Fix deferred |
| Red Hat Ansible Automation Platform 2 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux AI (RHEL AI) 3 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift AI (RHOAI) | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-02 Threatist record created from CVE-2025-67221
- 2026-10-03 Alias added: GHSA-hx9q-6w63-j58v
- 2026-10-25 EPSS moved to the 50th–90th percentile
References
More Ijl Orjson vulnerabilities
- TI-2024-18271 orjson.loads in orjson before 3.9.15 does not limit recursion for deeply nested JSON documents. CVSS 3.1HIGH 7.5
Sources
- CVE-2025-67221 · CVE Program
- CVE-2025-67221 · NVD
- FIRST EPSS
- GHSA-hx9q-6w63-j58v · GitHub Advisory Database · CC BY 4.0
- CVE-2025-67221 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences