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.
History

Fri, 23 May 2025 17:15:00 +0000

Type Values Removed Values Added
First Time appeared Xstream
Xstream xstream
CPEs cpe:2.3:a:xstream_project:xstream:*:*:*:*:*:*:*:* cpe:2.3:a:xstream:xstream:*:*:*:*:*:*:*:*
Vendors & Products Xstream Project
Xstream Project xstream
Xstream
Xstream xstream

cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2021-08-23T18:15:13

Updated: 2024-08-04T01:58:18.112Z

Reserved: 2021-08-16T00:00:00

Link: CVE-2021-39140

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2021-08-23T19:15:10.440

Modified: 2025-05-23T16:50:34.143

Link: CVE-2021-39140

cve-icon Redhat

Severity : Moderate

Publid Date: 2021-08-22T00:00:00Z

Links: CVE-2021-39140 - Bugzilla