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.
Advisories
Source ID Title
Debian DLA Debian DLA DLA-2471-1 libxstream-java security update
Debian DSA Debian DSA DSA-4811-1 libxstream-java security update
Github GHSA Github GHSA GHSA-mw36-7c6c-q4q2 XStream can be used for Remote Code Execution
Ubuntu USN Ubuntu USN USN-4714-1 XStream vulnerabilities
Ubuntu USN Ubuntu USN USN-4943-1 XStream vulnerabilities
Ubuntu USN Ubuntu USN USN-6978-1 XStream vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 07 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Sun, 13 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.93171}

epss

{'score': 0.93566}


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

Type Values Removed Values Added
First Time appeared Xstream
Xstream xstream
CPEs cpe:2.3:a:apache:activemq:5.15.4:*:*:*:*:*:*:*
cpe:2.3:a:xstream_project:xstream:*:*:*:*:*:*:*:*
cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:*
cpe:2.3:a:apache:activemq:5.16.0:*:*:*:*:*:*:*
cpe:2.3:a:xstream:xstream:*:*:*:*:*:*:*:*
Vendors & Products Xstream Project
Xstream Project xstream
Xstream
Xstream xstream

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-07T18:51:32.843Z

Reserved: 2020-10-01T00:00:00.000Z

Link: CVE-2020-26217

cve-icon Vulnrichment

Updated: 2024-08-04T15:49:07.258Z

cve-icon NVD

Status : Analyzed

Published: 2020-11-16T21:15:12.893

Modified: 2026-10-07T19:17:17.070

Link: CVE-2020-26217

cve-icon Redhat

Severity : Important

Publid Date: 2020-11-16T19:40:00Z

Links: CVE-2020-26217 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses