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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apache Software Foundation | Apache Jackrabbit | 2.23.0 – ≤ 2.23.5, 2.22.0 – ≤ 2.22.4, 2.20.0 – ≤ 2.20.17 | — |
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 | jackrabbit | No fix yet | — |
| Debian 13 | jackrabbit | No fix yet | — |
| Debian 12 | jackrabbit | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | jackrabbit | No fix yet | — |
| Ubuntu 26.04 LTS | jackrabbit | No fix yet | — |
| Ubuntu 24.04 LTS | jackrabbit | No fix yet | — |
| Ubuntu 22.04 LTS | jackrabbit | No fix yet | — |
| Ubuntu 20.04 LTS | jackrabbit | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | jackrabbit | No fix yet | — |
| Ubuntu 16.04 LTS | jackrabbit | No fix yet | — |
| Ubuntu 14.04 LTS | jackrabbit | No fix yet | — |
Advisories 1
- WID-SEC-2026-3816 Apache Jackrabbit: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 7, 2026