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 load and execute arbitrary code from a remote host only by manipulating the processed input stream. A user is only affected if using the version out of the box with JDK 1.7u21 or below. However, this scenario can be adjusted easily to an external Xalan that works regardless of the version of the Java runtime. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| x-stream | xstream | < 1.4.18 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libxstream-java | 1.4.18-1 | — |
| Debian 13 | libxstream-java | 1.4.18-1 | — |
| Debian 12 | libxstream-java | 1.4.18-1 | — |
| Debian 11 | libxstream-java | 1.4.15-3+deb11u1 | DSA-5004-1 |
| Debian 10 | libxstream-java | 1.4.11.1-1+deb10u3 | DSA-5004-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 9 | libxstream-java | 1.4.11.1-1+deb9u4 | DLA-2769-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | libxstream-java | 1.4.18-2ubuntu0.1 | USN-5946-1 |
| Ubuntu 20.04 LTS | libxstream-java | 1.4.11.1-1ubuntu0.3 | USN-5946-1 |
| Ubuntu 18.04 LTS | libxstream-java | 1.4.11.1-1+deb10u4build0.18.04.1 | USN-5946-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | libxstream-java | 1.4.8-1ubuntu0.1+esm1 | USN-5946-1 |
| Ubuntu Pro 14.04 LTS | libxstream-java | 1.4.7-1ubuntu0.1+esm1 | USN-5946-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | xstream +1 | 1.3.1-16.el7_9 | RHSA-2021:3956 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | xstream | 1.4.18-3.14.1 | SUSE-SU-2021:3476-1 |
| SLES 15 SP2 | xstream | 1.4.18-3.14.1 | SUSE-SU-2021:3476-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Manager Server Module 4.2 | xstream | 1.4.18-3.14.1 | SUSE-SU-2021:3476-1 |
| SUSE Manager Server Module 4.1 | xstream | 1.4.18-3.14.1 | SUSE-SU-2021:3476-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | xstream | 1.4.18-1.1 | openSUSE-SU-2024:10592-1 |
| openSUSE Leap 15.3 | xstream | 1.4.18-3.14.1 | openSUSE-SU-2021:3476-1 |
| openSUSE Leap 15.2 | xstream | 1.4.18-lp152.2.12.1 | openSUSE-SU-2021:1401-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | xstream +1 | 1.3.1-16.amzn2 | ALAS2-2021-1729 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | xstream +1 | 1.3.1-16.el7_9 | ELSA-2021-3956 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | com.thoughtworks.xstream:xstream | < 1.4.18 | 1.4.18 | GHSA-64xx-cq4q-mf44 |
Advisories 12
- RHSA-2021:3956 Red Hat Security Advisory: xstream security update Red Hat Security Advisories (RHSA) · Aug 9, 2026
- USN-5946-1 libxstream-java vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- DSA-5004-1 libxstream-java - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2769-1 libxstream-java - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2021:1401-1 Security update for xstream SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:3476-1 Security update for xstream SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10592-1 xstream-1.4.18-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3476-1 Security update for xstream SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2026-0180 Dell Data Protection Advisor: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 20, 2026
- WID-SEC-2023-0682 Red Hat Enterprise Linux (xstream): Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 27, 2023
- ALAS2-2021-1729 Important: xstream security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Dec 9, 2021
- ELSA-2021-3956 Important: xstream security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 25, 2021
References
- https://github.com/x-stream/xstream/security/advisories/GHSA-64xx-cq4q-mf44
- https://x-stream.github.io/CVE-2021-39139.html
- [debian-lts-announce] 20210929 [SECURITY] [DLA 2769-1] libxstream-java security update mailing-list
- FEDORA-2021-fbad11014a vendor-advisory
- FEDORA-2021-d894ca87dc vendor-advisory
- FEDORA-2021-5e376c0ed9 vendor-advisory
- DSA-5004 vendor-advisory
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://security.netapp.com/advisory/ntap-20210923-0003/
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujul2022.html