CVE-2026-56095 Insecure Deserialization in extension "Apache Solr for TYPO3 - Enterprise Search" (solr)
Attackers can achieve code execution via PHP object injection in the Apache Solr for TYPO3 extension when indexing user-generated content.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-56095?
CVE-2026-56095 is a high-severity unsafe deserialization vulnerability in Extension "Apache Solr for TYPO3 - Enterprise Search", published on 25 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-502
Which versions are affected by CVE-2026-56095?
How do I fix CVE-2026-56095?
No fix has been published for CVE-2026-56095 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-56095 being exploited?
There is no known exploitation of CVE-2026-56095 in the wild and no public exploit code.
Sources
Also known as GHSA-r2vh-j53r-xpr5.