CVE catalog
CVE-2021-43859
libxstream-java: CVE-2021-43859
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 7.93% · Oct 25, 2026
XStream is an open source java library to serialize objects to XML and back again. Versions prior to 1.4.19 may allow a remote attacker to allocate 100% CPU time on the target system depending on CPU type or parallel execution of such a payload resulting in a denial of service only by manipulating the processed input stream. XStream 1.4.19 monitors and accumulates the time it takes to add elements to collections and throws an exception if a set threshold is exceeded. Users are advised to upgrade as soon as possible. Users unable to upgrade may set the NO_REFERENCE mode to prevent recursion. See GHSA-rmr5-cpv2-vgjf for further details on a workaround if an upgrade is not possible.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | libxstream-java | sid | 1.4.21-2 | fixed |
| Debian | libxstream-java | forky | 1.4.21-2 | fixed |
| Debian | libxstream-java | trixie | 1.4.21-1 | fixed |
| Debian | libxstream-java | bookworm | 1.4.20-1+deb12u1 | fixed |
| Opensuse | xstream | tumbleweed | 1.4.19-1.1 | fixed |
| Suse | xstream | linux enterprise module for development tools 15 sp3 | 1.4.19-3.18.2 | fixed |
| Suse | xstream | manager server module 4.1 | 1.4.19-3.18.2 | fixed |
| Suse | xstream | manager server module 4.2 | 1.4.19-3.18.2 | fixed |
| Suse | xstream | linux enterprise real time 15 sp2 | 1.4.19-3.18.2 | fixed |
| Opensuse | xstream | leap 15.3 | 1.4.19-3.18.2 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | libxstream-java | source | sid | 1.4.19-1 | not yet assigned | Not reported | Not reported |
| Debian | libxstream-java | source | forky | 1.4.19-1 | not yet assigned | Not reported | Not reported |
| Debian | libxstream-java | source | trixie | 1.4.19-1 | not yet assigned | Not reported | Not reported |
| Debian | libxstream-java | source | bookworm | 1.4.19-1 | not yet assigned | Not reported | Not reported |
| Opensuse | xstream | rpm | tumbleweed | 1.4.19-1.1 | Not reported | OPENSUSE-SU-2024:11809-1 | Not reported |
| Suse | xstream | rpm | linux enterprise module for development tools 15 sp3 | 1.4.19-3.18.2 | Not reported | SUSE-SU-2022:0817-1 | Not reported |
| Suse | xstream | rpm | manager server module 4.1 | 1.4.19-3.18.2 | Not reported | SUSE-SU-2022:0817-1 | Not reported |
| Suse | xstream | rpm | manager server module 4.2 | 1.4.19-3.18.2 | Not reported | SUSE-SU-2022:0817-1 | Not reported |
| Suse | xstream | rpm | linux enterprise real time 15 sp2 | 1.4.19-3.18.2 | Not reported | SUSE-SU-2022:0817-1 | Not reported |
| Opensuse | xstream | rpm | leap 15.3 | 1.4.19-3.18.2 | Not reported | OPENSUSE-SU-2022:0817-1 | Not reported |
OpenFactory catalog packages
[openSUSE Tumbleweed]
- [xstream-benchmark]Unknown
Source package: [xstream]
Details (1)
1.4.21-1.7· noarch · tumbleweedUnknown · Fixed:
1.4.19-1.1Version impact unknown
dsa · xstream · opensuse · tumbleweed
- [xstream-javadoc]Unknown
Source package: [xstream]
Details (1)
1.4.21-1.7· noarch · tumbleweedUnknown · Fixed:
1.4.19-1.1Version impact unknown
dsa · xstream · opensuse · tumbleweed
- [xstream-parent]Unknown
Source package: [xstream]
Details (1)
1.4.21-1.7· noarch · tumbleweedUnknown · Fixed:
1.4.19-1.1Version impact unknown
dsa · xstream · opensuse · tumbleweed
- [xstream]Fixed
Source package: [xstream]
Details (1)
1.4.21-1.7· noarch · tumbleweedFixed · Fixed:
1.4.19-1.1dsa · xstream · opensuse · tumbleweed
[Debian 12 (Bookworm)]
- [libxstream-java]Fixed
Details (2)
1.4.20-1+deb12u1· all · bookwormFixed · Fixed:
1.4.19-1dsa · libxstream-java · debian · bookworm; dsa · libxstream-java · debian · 12
1.4.20-1+deb12u1· all · bookwormFixed · Fixed:
1.4.19-1dsa · libxstream-java · debian · bookworm; dsa · libxstream-java · debian · 12
[Debian 13 (Trixie)]
- [libxstream-java]Fixed
Details (2)
1.4.21-1· all · trixieFixed · Fixed:
1.4.19-1dsa · libxstream-java · debian · 13
1.4.21-1· all · trixieFixed · Fixed:
1.4.19-1dsa · libxstream-java · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2022_0817-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2021-43859]
- [https://osv.dev/vulnerability/DLA-2924-1]
- [https://osv.dev/vulnerability/DLA-4001-1]
- [https://osv.dev/vulnerability/SUSE-SU-2022:0817-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2022:0817-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2024:11809-1]
- [https://security-tracker.debian.org/tracker/CVE-2021-43859]
- [https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-43859.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2022/wid-sec-w-2022-0607.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]