CVE-2021-39152

XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to request data from internal resources that are not publicly available only by manipulating the processed input stream with a Java runtime version 14 to 8. 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](https://x-stream.github.io/security.html#framework), you will have to use at least version 1.4.18.

Score
CVSS 3.1 8.5 High
Status
Analyzed - security-advisories@github.com
Published
2021-08-23
Last modified
2026-10-07
Weaknesses
CWE-502, CWE-918

Affected products

References

 
 
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