TYPO3 PHP Object Injection via Unserialize in Indexer
CVE-2026-56095 Published on August 25, 2026
Insecure Deserialization in extension "Apache Solr for TYPO3 - Enterprise Search" (solr)
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.
Vulnerability Analysis
CVE-2026-56095 can be exploited with network access, and requires small amount of user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a Marshaling, Unmarshaling Vulnerability?
The application deserializes untrusted data without sufficiently verifying that the resulting data will be valid.
CVE-2026-56095 has been classified to as a Marshaling, Unmarshaling vulnerability or weakness.
Products Associated with CVE-2026-56095
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Affected Versions
Extension "Apache Solr for TYPO3 - Enterprise Search":- Version 13.0.0 and below 13.1.4 is affected.
- Version 12.0.0 and below 12.1.4 is affected.
- Before 11.6.6 is affected.