Buffer overflow in Dan Pascu python-cjson 1.0.5, when UCS-4 encoding is enabled, allows…
Priority LOW 33CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- Fixed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and GitHub. Impact type from CWE-119 and the CVSS impact.
Summary
Buffer overflow in Dan Pascu python-cjson 1.0.5, when UCS-4 encoding is enabled, allows context-dependent attackers to cause a denial of service (application crash) or possibly have unspecified other impact via vectors involving crafted Unicode input to the cjson.encode function.
Why it matters now
EPSS 0.01665 76th percentileScored 2026-11-07
Fix Fixed python-cjson (PyPI): 1.0.5.1
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | python-cjson (PyPI) | before 1.0.5.1 | 1.0.5.1 | Patch available | GHSA-cqmh-mpx2-g633 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- python-cjson (PyPI) Vendor— Affected before 1.0.5.1 Fixed in 1.0.5.1 Patch available GHSA-cqmh-mpx2-g633
Remediation
- Fix · GHSA-cqmh-mpx2-g633 python-cjson (PyPI) Fixed in 1.0.5.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2010-1666
- 2026-10-03 Alias added: GHSA-cqmh-mpx2-g633
References
Other 5
- ADV-2010-1774
- https://bugs.launchpad.net/ubuntu/+source/python-cjson/+bug/585274
- https://github.com/AGProjects/python-cjson/commit/dc2b8781b8666de5ca707318521f554904fdd690
- https://github.com/AGProjects/python-cjson
- https://github.com/pypa/advisory-database/tree/main/vulns/python-cjson/PYSEC-2010-30.yaml
More Dan Pascu Python-cjson vulnerabilities
- TI-2009-04680 Dan Pascu python-cjson 1.0.5 does not properly handle a ['/'] argument to cjson.encode… CVSS 2.0MEDIUM 4.3
Sources
- CVE-2010-1666 · CVE Program
- CVE-2010-1666 · NVD
- FIRST EPSS
- GHSA-cqmh-mpx2-g633 · GitHub Advisory Database · CC BY 4.0
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