Jython before 2.7.1rc1 allows attackers to execute arbitrary code via a crafted serialized PyFunction object.
Priority MEDIUM 51CWE-502Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 2 without a fix
Attack profile from CVSS 3.0 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-502.
Summary
Jython before 2.7.1rc1 allows attackers to execute arbitrary code via a crafted serialized PyFunction object.
Why it matters now
EPSS 0.06206 93rd percentileScored 2026-11-07
Fix Partial org.python:jython-standalone (Maven): 2.7.1b3org.python:jython (Maven): 2.7.1b3Red Hat: 2 without a fix
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 |
| — | org.python:jython-standalone (Maven) | before 2.7.1b3 | 2.7.1b3 | Patch available | GHSA-6r7r-jj8h-pq6v |
| — | org.python:jython (Maven) | before 2.7.1b3 | 2.7.1b3 | Patch available | GHSA-6r7r-jj8h-pq6v |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- org.python:jython-standalone (Maven) Vendor— Affected before 2.7.1b3 Fixed in 2.7.1b3 Patch available GHSA-6r7r-jj8h-pq6v
- org.python:jython (Maven) Vendor— Affected before 2.7.1b3 Fixed in 2.7.1b3 Patch available GHSA-6r7r-jj8h-pq6v
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:jython_project:jython:2.7.0:*:*:*:*:*:*:* | 2.7.0 | Vulnerable | Jython Project |
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Debian |
- cpe:2.3:a:jython_project:jython:2.7.0:*:*:*:*:*:*:* Versions 2.7.0 Vulnerable ·Jython Project
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
Remediation
- Fix · GHSA-6r7r-jj8h-pq6v org.python:jython-standalone (Maven) Fixed in 2.7.1b3 Advisory →
- Fix · GHSA-6r7r-jj8h-pq6v org.python:jython (Maven) Fixed in 2.7.1b3 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat JBoss Fuse Service Works 6 | Affected | No fix planned: Will not fix |
| Red Hat JBoss SOA Platform 5 | Affected | No fix planned: Will not fix |
Not affected: 3 products
- Red Hat Enterprise Linux 6
- Red Hat OpenShift Enterprise 2
- Red Hat Software Collections
Timeline
- 2026-10-02 Threatist record created from CVE-2016-4000
- 2026-10-03 Alias added: GHSA-6r7r-jj8h-pq6v
References
Advisory 7
Other 12
- [infra-devnull] 20190402 [GitHub] [flink] aloyszhang opened pull request #8100: [FLINK-12082] Bump up the jython-standalone version
- https://www.oracle.com/security-alerts/cpuapr2020.html
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
- https://www.oracle.com/security-alerts/cpujan2020.html
- https://github.com/jython/jython/commit/ee4200fdd5385d3f74a5cf1a781fa52d33bbb274
- https://lists.apache.org/thread.html/0919ec1db20b1022f22b8e78f355667df74d6142b463ff17d03ad533@%3Cdevnull.infra.apache.org%3E
- https://github.com/jython/jython
- https://bugs.jython.org/issue2454
Sources
- CVE-2016-4000 · CVE Program
- CVE-2016-4000 · NVD
- FIRST EPSS
- GHSA-6r7r-jj8h-pq6v · GitHub Advisory Database · CC BY 4.0
- CVE-2016-4000 · Red Hat security data · CC BY 4.0
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