Vulnerability · Published Aug 25, 2026 · Assigned by TYPO3

CVE-2026-56094Information Disclosure in extension "Apache Solr for TYPO3 - Enterprise Search" (solr)

Medium 6.3

In plain English

A medium-severity security flaw in Extension "Apache Solr for TYPO3 - Enterprise Search" from TYPO3. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).

Severity (CVSS 4.0)6.3Medium

Exploit odds (30 days)0.3%top 73.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

The extension allows a request-provided additionalFilters parameter to register a named siteHash filter before the system's own siteHash filter is applied, and the query builder does not overwrite an already-registered named filter. In a shared Solr core serving multiple TYPO3 sites, a visitor can use this to read public documents belonging to another site. The same root cause also affects the suggest top-results path when suggest is enabled.

Affected products (as reported)

Vendor	Product	Versions
TYPO3	Extension "Apache Solr for TYPO3 - Enterprise Search"	13.0.0 – before 13.1.412.0.0 – before 12.1.411.5.0 – before 11.6.60 – before 11.2.8

Weakness: CWE-943 · Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

References

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