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Vulnerability record · CVE-2016-4000 · published 6 July 2017

CVE-2016-4000: Jython project jython deserialization of untrusted data vulnerability

Jython Project · Jython

Jython before 2.7.1rc1 allows attackers to execute arbitrary code via a crafted serialized PyFunction object.

9.8 CVSS 3.0 Critical EPSS 6.2% · top 6.7% CWE-502 · Deserialization of untrusted data
9.8CVSS 3.0 base score, v2 7.5
6.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
34References
17 Jun 2026Last modified by NVD

Description

Jython before 2.7.1rc1 allows attackers to execute arbitrary code via a crafted serialized PyFunction object.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://bugs.jython.org/issue2454 Vendor Advisory
http://www.debian.org/security/2017/dsa-3893 Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
http://www.securityfocus.com/bid/105647
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=864859 Mailing ListThird Party Advisory
https://hg.python.org/jython/file/v2.7.1rc1/NEWS Third Party Advisory
https://hg.python.org/jython/rev/d06e29d100c0 PatchThird Party Advisory
https://lists.apache.org/thread.html/0919ec1db20b1022f22b8e78f355667df74d6142b463ff17d03ad533%40%3Cdevnull.infra.apache.
https://security-tracker.debian.org/tracker/CVE-2016-4000 Third Party Advisory
https://security.gentoo.org/glsa/201710-28
https://snyk.io/vuln/SNYK-JAVA-ORGPYTHON-31451 Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2020.html
https://www.oracle.com/security-alerts/cpujan2020.html
https://www.oracle.com/security-alerts/cpujul2020.html
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
http://bugs.jython.org/issue2454 Vendor Advisory
http://www.debian.org/security/2017/dsa-3893 Third Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
http://www.securityfocus.com/bid/105647
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=864859 Mailing ListThird Party Advisory
https://hg.python.org/jython/file/v2.7.1rc1/NEWS Third Party Advisory
https://hg.python.org/jython/rev/d06e29d100c0 PatchThird Party Advisory
https://lists.apache.org/thread.html/0919ec1db20b1022f22b8e78f355667df74d6142b463ff17d03ad533%40%3Cdevnull.infra.apache.
https://security-tracker.debian.org/tracker/CVE-2016-4000 Third Party Advisory
https://security.gentoo.org/glsa/201710-28
https://snyk.io/vuln/SNYK-JAVA-ORGPYTHON-31451 Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2020.html
https://www.oracle.com/security-alerts/cpujan2020.html
https://www.oracle.com/security-alerts/cpujul2020.html
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html

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Source: NIST National Vulnerability Database (record CVE-2016-4000), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.