libxstream-java: XStream is a Java library to serialize objects to XML and back again
CVE-2021-21348 is fixed in libxstream-java on 1 platform, first by libxstream-java 1.4.11.1-1~18.04.2, released March 22, 2021. It is not reported as exploited. Patch Radar priority: Routine.
XStream is a Java library to serialize objects to XML and back again. InXStream before version 1.4.16, there is a vulnerability which may allow aremote attacker to occupy a thread that consumes maximum CPU time and willnever return. No user is affected, who followed the recommendation to setupXStream's security framework with a whitelist limited to the minimalrequired types. If you rely on XStream's default blacklist of the SecurityFramework, you will have to use at least version 1.4.16.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libxstream-java · Ubuntu 18.04.6 LTS (bionic) | 1.4.11.1-1~18.04.2 | libxstream-java 1.4.11.1-1~18.04.2 | Mar 22, 2021 |
| libxstream-java · Ubuntu 20.04 LTS (focal) | 1.4.11.1-1ubuntu0.2 | libxstream-java 1.4.11.1-1ubuntu0.2 | Mar 22, 2021 |
| libxstream-java · Ubuntu 24.10 (oracular) | 1.4.15-2 | libxstream-java 1.4.15-2 | Jan 16, 2026 |
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