---
id: CVE-2026-56095
title: >-
  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 t…
summary: >-
  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 t…
severity: high
cvss: 7.7
cvssVector: 'CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'
cwe:
  - CWE-502
vendor: TYPO3
product: apache-solr-for-typo3/solr
affected:
  - apache-solr-for-typo3/solr >= 13.0.0 < 13.1.4
  - apache-solr-for-typo3/solr >= 12.0.0 < 12.1.4
  - apache-solr-for-typo3/solr >= 11.5.0 < 11.6.6
published: '2026-08-25'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T06:16:50.613'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-56095'
references:
  - url: 'https://typo3.org/security/advisory/typo3-ext-sa-2026-025'
    label: f4fb688c-4412-4426-b4b8-421ecf27b14a
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-08-25T14:10:41.182608Z'
cvssSource: cna
epss: 0.00247
epssPercentile: 0.16267
ingestedAt: '2026-09-17T06:12:17.979Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.