CVE-2026-50022
MediumCVSS 5.8Exploitation Probability (EPSS)
Low risk22th percentile - higher than 22% of all known CVEs
Summary
Metacat is data repository software for researchers. MetacatSolrIndex.query forwards the client-controlled qt parameter through Apache SolrJ from search endpoints such as /d1/mn/v2/query/solr/ to its privileged Solr backend. An unauthenticated client can select the /admin/file handler, and SolrJ reformats the parameter into a request accepted even when handleSelect=false is configured on Solr 7.0 or later. When Solr returns the selected core configuration file, Metacat embeds the raw content in an XML processing error response, disclosing internal files such as solrconfig.xml. This issue is fixed in version 3.4.2.
Risk Assessment
An unauthenticated attacker can disclose internal Solr configuration files and profile the infrastructure. This may facilitate further attacks on the system.
Recommendation
Update Metacat to version 3.4.2 or later. Consider restricting access to search endpoints and the Solr backend.
Other vulnerabilities in Metacat
See all- CVE-2026-48528Critical
Metacat versions 2.0.0 through 3.4.0 contain an unauthenticated SQL injection vulnerability in the `/cn/v1/object` and `/cn/v2/object` REST API endpoints. The `nodeId` parameter is unsanitized and concatenated into SQL queries, allowing attackers to execute arbitrary SQL, including reading, modifying, and deleting data from the PostgreSQL database. SQL errors are reflected in XML messages, enabling data exfiltration.
- CVE-2026-47754Critical
Metacat versions 2.x through 2.19.1 and all 1.x versions contain an unauthenticated path traversal in the `archiveEntryName` parameter of the `action=read` endpoint in the legacy 1.x API. An attacker can read any file accessible to the Tomcat process by sending a single GET request, as path validation is missing and the permission check is commented out.
- CVE-2026-48114Critical
Metacat is data repository software that contains an unauthenticated SQL injection vulnerability in the /harvesterRegistration endpoint in versions 2.0.0 and above. Exploiting this vulnerability allows full read/write/execute access in the Metacat database context.
Original NVD description (English source)
Metacat is data repository software that helps researchers preserve, share, and discover data. Prior to 3.4.2, MetacatSolrIndex.query forwards the client-controlled qt parameter through Apache SolrJ from search endpoints such as /d1/mn/v2/query/solr/ to its privileged Solr backend. An unauthenticated client can select the /admin/file handler, and SolrJ reformats the parameter into a request accepted even when handleSelect=false is configured on Solr 7.0 or later. When Solr returns the selected core configuration file, Metacat embeds the raw content in an XML processing error response, disclosing internal files such as solrconfig.xml and enabling infrastructure profiling. This issue is fixed in version 3.4.2.