Apache Jackrabbit up to 2.20.17/2.22.4/2.23.5 DavEx client Class.forName input validation

Summaryinfo

A vulnerability classified as critical was found in Apache Jackrabbit up to 2.20.17/2.22.4/2.23.5. The affected element is the function Class.forName of the component DavEx client. Such manipulation leads to input validation. This vulnerability is listed as CVE-2026-92415. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in Apache Jackrabbit up to 2.20.17/2.22.4/2.23.5 and classified as critical. Affected by this issue is the function Class.forName of the component DavEx client. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability. CVE summarizes:

— 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.

The advisory is available at lists.apache.org. This vulnerability is handled as CVE-2026-92415 since 09/16/2026. The exploitation is known to be easy. The attack may be launched remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 10/09/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-3816). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

• Apache Jackrabbit

Productinfo

Vendor

• Apache

Name

• Jackrabbit

Version

• 2.20.0
• 2.20.1
• 2.20.2
• 2.20.3
• 2.20.4
• 2.20.5
• 2.20.6
• 2.20.7
• 2.20.8
• 2.20.9
• 2.20.10
• 2.20.11
• 2.20.12
• 2.20.13
• 2.20.14
• 2.20.15
• 2.20.16
• 2.20.17
• 2.22.0
• 2.22.1
• 2.22.2
• 2.22.3
• 2.22.4
• 2.23.0
• 2.23.1
• 2.23.2
• 2.23.3
• 2.23.4
• 2.23.5

License

• open-source

Website

• Vendor: https://www.apache.org/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion