VULNERABILITY INTELLIGENCE

CVE-2021-39140

CVSS score6.5 MEDIUM
EPSS probability5.92%
CISA KEVNot currently listed
Published2021-08-23
Last modified2026-10-07
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Description

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.

Weakness classification

  • security-advisories@github.com: CWE-502
  • nvd@nist.gov: CWE-502

Primary references