PHP Object Injection Vulnerability in TYPO3 Extension by TYPO3 GmbH
CVE-2026-56095

7.7HIGH

Key Information:

Vendor

Typo3

Status
Extension "apache Solr For Typo3 - Enterprise Search"
Vendor
CVE Published:
25 August 2026

What is CVE-2026-56095?

A vulnerability exists in TYPO3 extensions where the indexer improperly handles multi-value data for SOLR_CLASSIFICATION, SOLR_MULTIVALUE, and SOLR_RELATION content object types. By utilizing PHP's unserialize() function without sufficient validation, the vulnerability permits crafted user-generated content saved in the TYPO3 database to exploit this weakness. This enables potential attackers to inject malicious objects, leading to severe consequences for data integrity and application security.

Affected Version(s)

Extension "Apache Solr for TYPO3 - Enterprise Search" 13.0.0 < 13.1.4

Extension "Apache Solr for TYPO3 - Enterprise Search" 12.0.0 < 12.1.4

Extension "Apache Solr for TYPO3 - Enterprise Search" 0 < 11.6.6

References

https://typo3.org/security/advisory/typo3-ext-sa-2026-025
vendor-advisory

CVSS V4

Score:
7.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Marc Bastian Heinrichs
Rafael Kähm
EXT:solr team by dkd Internet Service GmbH
.