CVE-2026-92415 Apache Jackrabbit: DavEx client runs Class.forName + (String)-constructor on server-controlled error bodies
A malicious WebDAV server can trigger unsafe reflection in the Jackrabbit client, allowing arbitrary class instantiation and potential file manipulation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-92415?
CVE-2026-92415 is a medium-severity unsafe deserialization vulnerability in Apache Jackrabbit, published on 7 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
— Use of Externally-Controlled Input to Select Classes or Code vulnerability in Apache Jackrabbit's WebDAV/Davex client.
A malicious WebDAV/DavEx server, or an attacker able to intercept the connection, can cause the client to instantiate arbitrary classes from its classpath, which can lead to arbitrary file creation or truncation.
Only applications that use jackrabbit-spi2dav (directly or through jackrabbit-jcr2dav) to connect to a remote repository are affected. Jackrabbit servers are not affected.
Category: unsafe reflection on wire data (HIGH).
This issue affects Apache Jackrabbit: from 2.23.0 through 2.23.5, from 2.22.0 through 2.22.4, from 2.20.0 through 2.20.17.
Users are recommended to upgrade to versions 2.23.6, 2.22.5, or 2.20.18 which fix the issue.
Weakness: CWE-470
Which versions are affected by CVE-2026-92415?
It affects 1 product.
Products include Apache Jackrabbit.
How do I fix CVE-2026-92415?
No fix has been published for CVE-2026-92415 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-92415 being exploited?
There is no known exploitation of CVE-2026-92415 in the wild and no public exploit code.
Other vulnerabilities in Apache Jackrabbit
- CVE-2023-37895 Apache Jackrabbit RMI access can lead to RCE
- CVE-2026-92414 Apache Jackrabbit: Pre-auth hijack of cached sessions via derivable WebDAV lock tokens
- CVE-2025-53689 Apache Jackrabbit: XXE vulnerability in jackrabbit-spi-commons
- CVE-2016-6801 Apache Jackrabbit Authentication Hijacking Vulnerability
- CVE-2025-58782 Apache Jackrabbit Core, Apache Jackrabbit JCR Commons: JNDI injection risk with JndiRepositoryFactory
Sources
Also known as DEBIAN-CVE-2026-92415, GHSA-f7m4-mw9m-xwg5, UBUNTU-CVE-2026-92415.