Dan Pascu python-cjson 1.0.5 does not properly handle a ['/'] argument to cjson.encode…
Priority LOW 23CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- None · Partial · None
- Fix status
- Fixed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
Dan Pascu python-cjson 1.0.5 does not properly handle a ['/'] argument to cjson.encode, which makes it easier for remote attackers to conduct certain cross-site scripting (XSS) attacks involving Firefox and the end tag of a SCRIPT element.
Why it matters now
EPSS 0.01354 71st percentileScored 2026-11-07
Fix Fixed python-cjson (PyPI): 1.1.0
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 1.1.0 | 1.1.0 | Patch available | GHSA-95jp-77w6-qj52 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- python-cjson (PyPI) Vendor— Affected before 1.1.0 Fixed in 1.1.0 Patch available GHSA-95jp-77w6-qj52
Remediation
- Fix · GHSA-95jp-77w6-qj52 python-cjson (PyPI) Fixed in 1.1.0 Advisory →
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2009-4924
- 2026-10-03 Alias added: GHSA-95jp-77w6-qj52
References
Advisory 2
Other 6
- http://pypi.python.org/pypi/python-cjson/
- http://t3.dotgnu.info/blog/insecurity/quotes-dont-help.html
- https://github.com/AGProjects/python-cjson
- https://github.com/pypa/advisory-database/tree/main/vulns/python-cjson/PYSEC-2010-26.yaml
- https://github.com/pypa/advisory-db/tree/main/vulns/python-cjson/PYSEC-2010-26.yaml
- http://pypi.python.org/pypi/python-cjson
More Dan Pascu Python-cjson vulnerabilities
- TI-2010-01609 Buffer overflow in Dan Pascu python-cjson 1.0.5, when UCS-4 encoding is enabled, allows… CVSS 2.0MEDIUM 6.8
Sources
- CVE-2009-4924 · CVE Program
- CVE-2009-4924 · NVD
- FIRST EPSS
- GHSA-95jp-77w6-qj52 · GitHub Advisory Database · CC BY 4.0
- CVE-2009-4924 · 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