XStream is vulnerable to an Arbitrary Code Execution attack
Published Mar 22, 2021 · Updated Nov 3, 2026
Original summary
Normalized public record · Updated Nov 3, 2026
XStream is vulnerable to an Arbitrary Code Execution attack
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
The vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host 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.
Potential impact
The vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host 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.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- LOW
- Confidence
- Not available
- Aliases
- None reported
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
- x-stream.github.io ↗
- x-stream.github.io ↗
- Security advisory ↗
- x-stream.github.io ↗
- [debian-lts-announce] 20210403 [SECURITY] [DLA 2616-1] libxstream-java security update ↗
- [jmeter-dev] 20210406 [GitHub] [jmeter] sseide opened a new pull request #655: update x-stream to 1.4.16 (from 1.4.15) ↗
- [activemq-users] 20210427 Release date for ActiveMQ v5.16.2 to fix CVEs ↗
- security.netapp.com ↗
- www.oracle.com ↗
- FEDORA-2021-fbad11014a ↗
- FEDORA-2021-d894ca87dc ↗
- www.oracle.com ↗
Record history
Published Mar 22, 2021 · Last refreshed Nov 3, 2026