SummaryAI-written · claude-haiku-5-5AI-written · claude-haiku-5-5Written by a language model from the source data on this page. Not reviewed by a person. Generated 29 Oct 2026.
A regression in the XStream library (product: XStream, the XML/JSON serialization API) introduced in version 1.4.10 and fixed in 1.4.11 reopens a previous deserialization flaw. When the security framework has not been initialized, a remote attacker can run arbitrary shell commands by supplying crafted XML or other supported formats such as JSON for unmarshalling, with no authentication or user interaction required.
Official description · CVE.orgSource dataSource dataCopied from an authoritative feed: NVD, CVE.org, CISA KEV, FIRST EPSS or MITRE CTID mappings, or labelled by the annotators of a published dataset. Copied from CVE.org.
It was found that xstream API version 1.4.10 before 1.4.11 introduced a regression for a previous deserialization flaw. If the security framework has not been initialized, it may allow a remote attacker to run arbitrary shell commands when unmarshalling XML or any supported format. e.g. JSON. (regression of CVE-2013-7285)
Priority scorePatchfirst’s 0 to 100 ranking. It adds points for CISA KEV listing, ransomware use, EPSS, threat reports, public exploit code and CVSS. Every CVE page shows the breakdown.Breakdown
25.1 / 100
Exploited
Not confirmed
Reports
0
Tactics
0/15
Exploitation timelineDated milestones for a CVE: when it was disclosed, when exploit code became public, when exploitation was confirmed, and when threat reports named it.
Disclosed on 23 Jul 2019. No public exploit code or confirmed exploitation is recorded.
Patch historyEarlier and later CVEs in the same code, in date order. It shows when a fix was bypassed or incomplete and which version finally fixed it.
A fix was bypassed or incomplete once over 8 years. The latest fix listed for xstream is 1.4.15.
Same bug familyLinked by evidence that a fix failed or the same code was patched again. Oldest first.
CVE-2017-7957XStream through 1.4.9, when a certain denyTypes workaround is…29 Apr 2017
relatedMedium
Why these are linked: Link confidenceHow strong the evidence is that two CVEs are related. High: stated in the CVE text or linked in an advisory, or the same code was patched one release apart. Medium: the same code, or a version step plus a similar description. Low: similar description only.
CVE-2013-7285Xstream API versions up to 1.4.6 and version 1.4.10, if the…15 May 2019
regression ofHigh
Why these are linked: Link confidenceHow strong the evidence is that two CVEs are related. High: stated in the CVE text or linked in an advisory, or the same code was patched one release apart. Medium: the same code, or a version step plus a similar description. Low: similar description only.
Stated in the CVE textIf the security framework has not been initialized, it may allow a remote attacker to run arbitrary shell commands when unmarshalling XML or any supported format. e.g. JSON. (regression of CVE-2013-7285)
Similar weakness in the same product (machine-matched)same package + description similarity
This CVECVE-2019-10173It was found that xstream API version 1.4.10 before 1.4.11…23 Jul 2019
Next fix in the same packageLow
Why these are linked: Link confidenceHow strong the evidence is that two CVEs are related. High: stated in the CVE text or linked in an advisory, or the same code was patched one release apart. Medium: the same code, or a version step plus a similar description. Low: similar description only.
Fixed one release later1.4.11 → 1.4.14-java7 (com.thoughtworks.xstream:xstream)
CVE-2020-26217Remote Code Execution in XStream16 Nov 2020
same family
CVE-2021-43859Denial of Service by injecting highly recursive collections or…1 Feb 2022
relatedMedium
Why these are linked: Link confidenceHow strong the evidence is that two CVEs are related. High: stated in the CVE text or linked in an advisory, or the same code was patched one release apart. Medium: the same code, or a version step plus a similar description. Low: similar description only.
MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. techniques
No techniques linked
No ATT&CK techniques are linked to this CVE yet. MITRE CTID has not mapped it, and no report passage in the corpus ties it to a technique.
Am I affected? What do I upgrade to?
From GitHub Security Advisories and OSVSourceSource dataCopied from an authoritative feed: NVD, CVE.org, CISA KEV, FIRST EPSS or MITRE CTID mappings, or labelled by the annotators of a published dataset. GitHub Security Advisories and OSV.
1 package in 1 ecosystem. Main package: com.thoughtworks.xstream:xstream.