Homepage

Deserialization of Untrusted Data The advisory has been revoked - it doesn't affect any version of package xstream.src  (opens in a new tab)

Threat Intelligence

EPSS
3.29% (88th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-RHEL10-XSTREAMSRC-15340108
  • published25 Feb 2026
  • disclosed12 Mar 2021
Report a new vulnerability Found a mistake?

Introduced: 12 Mar 2021

CVE-2021-21347  (opens in a new tab)
CWE-502  (opens in a new tab)

Amendment

The Red Hat security team deemed this advisory irrelevant for RHEL:10.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xstream.src package and not the xstream.src package as distributed by RHEL.

XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is a vulnerability which may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16.

References