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CVE-2026-56095

Insecure Deserialization in extension "Apache Solr for TYPO3 - Enterprise Search" (solr)

HIGH
7.7
CVSS Score
Published: August 25, 2026 at 09:00 AM UTC
Updated: September 17, 2026 at 06:16 AM UTC
1 product affected across 1 vendorSolr

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Severity
HIGH7.7
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Solr· TYPO3composer
60%
11.5.0 ≤ v < 11.6.612.0.0 ≤ v < 12.1.413.0.0 ≤ v < 13.1.411.5.012.0.013.0.0
Affected range stops below 11.6.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 12.1.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 13.1.4, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://typo3.org/security/advisory/typo3-ext-sa-2026-025

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.7HIGHTYPO3
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-502

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