Security Advisory

CVE-2021-43859

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2022-02-01 12:08:57

Last updated 2025-11-03 21:45:34

Assigner GitHub_M

CVSS score 7.5

State PUBLISHED

Description

XStream is an open source java library to serialize objects to XML and back again. Versions prior to 1.4.19 may allow a remote attacker to allocate 100% CPU time on the target system depending on CPU type or parallel execution of such a payload resulting in a denial of service only by manipulating the processed input stream. XStream 1.4.19 monitors and accumulates the time it takes to add elements to collections and throws an exception if a set threshold is exceeded. Users are advised to upgrade as soon as possible. Users unable to upgrade may set the NO_REFERENCE mode to prevent recursion. See GHSA-rmr5-cpv2-vgjf for further details on a workaround if an upgrade is not possible.

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