CVE-2020-26217

unknown
Published 2020-11-16 · Modified 2026-03-13
CVSS v3
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
CVSS v2
VIR risk

Description

XStream before version 1.4.14 is vulnerable to Remote Code Execution.The vulnerability may allow a remote attacker to run arbitrary shell commands only by manipulating the processed input stream. Only users who rely on blocklists are affected. Anyone using XStream's Security Framework allowlist is not affected. The linked advisory provides code workarounds for users who cannot upgrade. The issue is fixed in version 1.4.14.

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-2020-26217

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2020-26217.html

OS impact

OSVersionStatusFixed in
suse slesaffected
debian debianbookwormfixed1.4.14-1
debian debianbullseyefixed1.4.14-1
debian debianforkyfixed1.4.14-1
debian debiansidfixed1.4.14-1
debian debiantrixiefixed1.4.14-1

Package impact

EcosystemPackageVulnerableFixed
java Mavencom.thoughtworks.xstream:xstream<1.4.14-java71.4.14-java7

References

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