TYPO3 Apache Solr up to 11.6.5/12.1.3/13.1.3 SiteHash Filter additionalFilters information disclosure

Summaryinfo

A vulnerability was found in TYPO3 Apache Solr up to 11.6.5/12.1.3/13.1.3. It has been declared as problematic. This affects an unknown function of the component SiteHash Filter. The manipulation of the argument additionalFilters results in information disclosure. This vulnerability is cataloged as CVE-2026-56094. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as problematic has been found in TYPO3 Apache Solr up to 11.6.5/12.1.3/13.1.3. Affected is some unknown processing of the component SiteHash Filter. The manipulation of the argument additionalFilters with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. CVE summarizes:

The extension allows a request-provided additionalFilters parameter to register a named siteHash filter before the system's own siteHash filter is applied, and the query builder does not overwrite an already-registered named filter. In a shared Solr core serving multiple TYPO3 sites, a visitor can use this to read public documents belonging to another site. The same root cause also affects the suggest top-results path when suggest is enabled.

The advisory is available at typo3.org. This vulnerability is traded as CVE-2026-56094 since 06/18/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

Upgrading to version 11.6.6, 12.1.4 or 13.1.4 eliminates this vulnerability.

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Productinfo

Type

• Content Management System

Vendor

• TYPO3

Name

• Apache Solr

Version

• 11.6.0
• 11.6.1
• 11.6.2
• 11.6.3
• 11.6.4
• 11.6.5
• 12.1.0
• 12.1.1
• 12.1.2
• 12.1.3
• 13.1.0
• 13.1.1
• 13.1.2
• 13.1.3

License

• open-source

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CPE 2.2info

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