CVE-2026-34151: XWiki Platform Old Core Remote Code Execution Vulnerability
HIGHCVE-2026-34151 is a HIGH remote code execution vulnerability (CWE-24: Path Traversal: '../filedir') affecting XWiki Platform Old Core libraries in the Maven ecosystem. The issue involves resource path traversal via /skin/ action endpoint in jetty 12+. Remediation is available by upgrading affected packages to version 17.10.5, 18.2.0.
CVE-2026-34151 at a Glance
How to Fix CVE-2026-34151
To remediate this vulnerability, upgrade all affected XWiki Platform Old Core dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
<dependency>
<groupId>org.xwiki.platform</groupId>
<artifactId>xwiki-platform-oldcore</artifactId>
<version>17.10.5</version>
</dependency><dependency>
<groupId>org.xwiki.platform</groupId>
<artifactId>xwiki-platform-oldcore</artifactId>
<version>18.2.0</version>
</dependency>Run the following command in your project directory to verify that all resolved dependencies use the patched release:
mvn dependency:tree -Dincludes=org.xwiki.platformHow to Check if You Are Affected
To determine whether your Java application is affected by CVE-2026-34151, inspect your build dependencies using the Maven Dependency Plugin:
mvn dependency:tree -Dincludes=org.xwiki.platformAnalyze the terminal output to locate any version of XWiki Platform Old Core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 17.10.5), your application is affected.
Note: The mvn dependency:tree -Dincludes=org.xwiki.platform command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-24: Path Traversal: '../filedir', where the product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize "../" sequences that can resolve to a location that is outside of that directory. In XWiki Platform Old Core, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2026-34151 Affected XWiki Platform Old Core Versions
2 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
org.xwiki.platform:xwiki-platform-oldcore
|
Maven |
< 17.10.5
|
17.10.5
|
|
org.xwiki.platform:xwiki-platform-oldcore
|
Maven |
≥ 18.0.0-rc-1
< 18.2.0
|
18.2.0
|
References
Frequently Asked Questions
What is CVE-2026-34151?
Which XWiki Platform Old Core versions are affected?
What version fixes CVE-2026-34151?
Is xwiki-platform-oldcore affected?
What CWE is associated with CVE-2026-34151?
How can I check Maven dependencies for CVE-2026-34151?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-qj4x-9g63-25g6",
"modified" : "2026-07-07T13:01:22Z",
"published" : "2026-07-07T13:01:21Z",
"aliases" : [ "CVE-2026-34151" ],
"summary" : "XWiki Platform Old Core: Resource path traversal via /skin/ action endpoint in Jetty 12+",
"details" : "### Impact\n\nWith Jetty 12+ a user can craft a URL to access any resource the Jetty instance is allowed to access.\n\nFor example `http://[host]/xwiki/bin/skin/..%252f/..%252f..%252f..%252f..%252f..%252f..%252f..%252fetc/passwd` allows downloading the content of the /etc/passwd file, provided Jetty is allowed to read it, and if your XWiki webapp is located exactly 5 levels below `/` (like `/var/lib/jetty/webapps/xwiki`, which is the case in the docker image, for example).\n\nAnother example which does not go out of the XWiki webapp, but it's still a vulnerability (since users should not be allowed to access Hibernate or XWiki configuration files) is `http://[host]/xwiki/bin/skin/..%252f/..%252fWEB-INF/xwiki.cfg`.\n\n### Patches\n\nThis vulnerability has been patched in XWiki 17.10.5 and 18.2.0.\n\n### Workarounds\n\nA possible workaround is to use a different application server, like Jetty < 12 (in the case of XWiki < 17) or Tomcat, which don't seem to be impacted.\n\n### Resources\n\n* https://jira.xwiki.org/browse/XWIKI-24075\n* https://jira.xwiki.org/browse/XCOMMONS-3594\n\n### For more information\n\nIf there are any questions or comments about this advisory:\n* Open an issue in [Jira XWiki.org](https://jira.xwiki.org/)\n* Send an email to the [Security Mailing List](mailto:security@xwiki.org)\n\n### Attribution\n\n Lê Ngọc Khoa reported the vulnerability.",
"severity" : [ {
"type" : "CVSS_V4",
"score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Maven",
"name" : "org.xwiki.platform:xwiki-platform-oldcore"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "17.10.5"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Maven",
"name" : "org.xwiki.platform:xwiki-platform-oldcore"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "18.0.0-rc-1"
}, {
"fixed" : "18.2.0"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-qj4x-9g63-25g6"
}, {
"type" : "WEB",
"url" : "https://github.com/xwiki/xwiki-commons/pull/1675"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/xwiki/xwiki-platform"
}, {
"type" : "WEB",
"url" : "https://jira.xwiki.org/browse/XCOMMONS-3594"
}, {
"type" : "WEB",
"url" : "https://jira.xwiki.org/browse/XWIKI-24075"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-24" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2026-07-07T13:01:21Z",
"nvd_published_at" : null
}
}