CVE-2026-56095: CWE-502 Deserialization of Untrusted Data in TYPO3 Extension "Apache Solr for TYPO3 - Enterprise Search"
Description
The extension's indexer passed every field value returned by content object rendering through PHP's unserialize() function when transferring multi-value data for the SOLR_CLASSIFICATION, SOLR_MULTIVALUE and SOLR_RELATION content object types, rather than a safe format. If user-generated content saved in the TYPO3 database can reach an indexed field, this exposes a PHP Object Injection surface.
CVSS v4.0
Score 7.7high
Affected software
TYPO3
Extension "Apache Solr for TYPO3 - Enterprise Search"
pkg:composer/apache-solr-for-typo3/solrRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The TYPO3 extension "Apache Solr for TYPO3 - Enterprise Search" improperly deserializes untrusted data by passing every field value returned by content object rendering through PHP's unserialize() function when handling multi-value data for SOLR_CLASSIFICATION, SOLR_MULTIVALUE, and SOLR_RELATION content object types. This unsafe deserialization creates a PHP Object Injection vulnerability if user-generated content stored in the TYPO3 database can be indexed, potentially allowing attackers to execute arbitrary code or manipulate application behavior. The vulnerability affects versions >=11.5.0 <11.6.6, >=12.0.0 <12.1.4, and >=13.0.0 <13.1.4 of the extension.
Potential Impact
Successful exploitation could lead to PHP Object Injection, which may allow attackers to execute arbitrary code or perform unauthorized actions within the TYPO3 environment. The vulnerability requires network access with low privileges and partial user interaction but has high impact on confidentiality, integrity, and availability as indicated by the CVSS 7.7 score.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Users should monitor TYPO3 vendor advisories for updates and avoid exposing user-generated content to the vulnerable indexing process until a fix is available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- TYPO3
- Date Reserved
- 2026-06-18T17:29:39.231Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a8d5b63acd9273b49f36560
Added to database: 08/25/2026, 09:07:47 UTC
Last enriched: 09/17/2026, 23:19:16 UTC
Last updated: 10/07/2026, 18:48:21 UTC
Views: 41
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