CVE-2021-39139: Debian Linux

High severity, CVSS 8.8. EPSS: 4.5% chance of exploitation in the next 30 days.

XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. A user is only affected if using the version out of the box with JDK 1.7u21 or below. However, this scenario can be adjusted easily to an external Xalan that works regardless of the version of the Java runtime. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.

Affected products

  • Debian Debian Linux: version 9.0 only; version 10.0 only; version 11.0 only
  • Fedoraproject Fedora: version 33 only; version 34 only; version 35 only
  • Netapp Snapmanager: affected versions not specified
  • Oracle Business Activity Monitoring: version 12.2.1.4.0 only
  • Oracle Commerce Guided Search: version 11.3.2 only
  • Oracle Communications Billing And Revenue Management Elastic Charging Engine: version 11.3 only; version 12.0 only
  • Oracle Communications Cloud Native Core Automated Test Suite: version 1.9.0 only
  • Oracle Communications Cloud Native Core Binding Support Function: version 1.10.0 only
  • Oracle Communications Cloud Native Core Policy: version 1.14.0 only
  • Oracle Communications Unified Inventory Management: version 7.3.4 only; version 7.3.5 only; version 7.4.0 only; version 7.4.1 only; version 7.4.2 only
  • Oracle Retail Xstore Point Of Service: version 16.0.6 only; version 17.0.4 only; version 18.0.3 only; version 19.0.2 only; version 20.0.1 only
  • Oracle Utilities Framework: version 4.2.0.2.0 only; version 4.2.0.3.0 only; version 4.3.0.1.0 only; version 4.3.0.6.0 only; version 4.4.0.0.0 only; version 4.4.0.2.0 only; …
  • Oracle Utilities Testing Accelerator: version 6.0.0.1.1 only
  • Oracle Webcenter Portal: version 12.2.1.3.0 only; version 12.2.1.4.0 only
  • XStream XStream: before 1.4.18 (fixed in 1.4.18)

Published 2021-08-23. Last modified 2026-10-07.