CVE-2021-39150

unknown
Published 2021-08-25 · Modified 2026-03-13
CVSS v3
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS v2
VIR risk

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 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.

Predictions

Exploit likelihood
30%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-39150

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-39150.html

OS impact

OSVersionStatusFixed in
suse slesaffected
debian debianbookwormfixed1.4.18-1
debian debianbullseyefixed1.4.15-3+deb11u1
debian debianforkyfixed1.4.18-1
debian debiansidfixed1.4.18-1
debian debiantrixiefixed1.4.18-1

Package impact

EcosystemPackageVulnerableFixed
java Mavencom.thoughtworks.xstream:xstream<1.4.181.4.18

References

Verify integrity in audit chain (admin only). AS-IS.