TYPO3 Apache Solr for TYPO3 Extension up to 11.6.5/12.1.3/13.1.3 Indexer unserialize deserialization

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.96

Summaryinfo

A vulnerability, which was classified as critical, was found in TYPO3 Apache Solr for TYPO3 Extension up to 11.6.5/12.1.3/13.1.3. This issue affects the function unserialize of the component Indexer. Such manipulation leads to deserialization. This vulnerability is referenced as CVE-2026-56095. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in TYPO3 Apache Solr for TYPO3 Extension up to 11.6.5/12.1.3/13.1.3 and classified as critical. Affected by this issue is the function unserialize of the component Indexer. The manipulation with an unknown input leads to a deserialization vulnerability. Using CWE to declare the problem leads to CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at typo3.org. This vulnerability is handled as CVE-2026-56095 since 06/18/2026. The exploitation is known to be easy. The attack may be launched remotely. Technical details are known, but there is no available exploit.

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

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Deserialization
CWE: CWE-502 / CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Apache Solr for TYPO3 Extension 11.6.6/12.1.4/13.1.4

Timelineinfo

06/18/2026 CVE reserved
08/25/2026 +68 days Advisory disclosed
08/25/2026 +0 days VulDB entry created
08/25/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: typo3.org
Status: Confirmed

CVE: CVE-2026-56095 (🔒)
GCVE (CVE): GCVE-0-2026-56095
GCVE (VulDB): GCVE-100-394970

Entryinfo

Created: 08/25/2026 11:18
Changes: 08/25/2026 11:18 (68)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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