cvedb.io
CVE-2021-39140
MEDIUM · CVSS 6.5
EPSS exploitation probability: 0%
Published 2021-08-23T19:15:10.440 · Last modified 2026-06-17T04:03:08.827

Summary

XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability 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. 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

xstream — xstream

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.