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  5. CVE-2016-4000

CVE-2016-4000: Deserialization of Untrusted Data in Jython

May 13, 2022 (updated July 2, 2026)

Jython before 2.7.1b3 allows attackers to execute arbitrary code via a crafted serialized PyFunction object.

References

  • bugs.debian.org/cgi-bin/bugreport.cgi?bug=864859
  • bugs.jython.org/issue2454
  • github.com/advisories/GHSA-6r7r-jj8h-pq6v
  • github.com/jython/jython/commit/ee4200fdd5385d3f74a5cf1a781fa52d33bbb274
  • hg.python.org/jython/file/v2.7.1rc1/NEWS
  • hg.python.org/jython/rev/d06e29d100c0
  • lists.apache.org/thread.html/0919ec1db20b1022f22b8e78f355667df74d6142b463ff17d03ad533@%3Cdevnull.infra.apache.org%3E
  • nvd.nist.gov/vuln/detail/CVE-2016-4000
  • security-tracker.debian.org/tracker/CVE-2016-4000
  • security.gentoo.org/glsa/201710-28
  • snyk.io/vuln/SNYK-JAVA-ORGPYTHON-31451
  • www.oracle.com/security-alerts/cpuapr2020.html
  • www.oracle.com/security-alerts/cpujan2020.html
  • www.oracle.com/security-alerts/cpujul2020.html
  • www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
  • www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
  • www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html

Code Behaviors & Features

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Affected versions

All versions before 2.7.1-b.3

Fixed versions

  • 2.7.1-b.3

Solution

Upgrade to version 2.7.1-b.3 or above.

Impact 9.8 CRITICAL

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

Learn more about CVSS

Weakness

  • CWE-502: Deserialization of Untrusted Data

Source file

maven/org.python/jython-standalone/CVE-2016-4000.yml

Spotted a mistake? Edit the file on GitLab.

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