Medium 5.8Published Sep 17, 2026

CVE-2026-50022Metacat acts as unintended proxy to backend Apache SOLR engine

Updated under an hour ago (2026-10-19 09:50 UTC)

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Every CVE for NCEAS metacat

Exploited in the last 30 days

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.

CVSS: 5.8 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
Weakness (CWE): CWE-441
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Sep 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

NCEAS metacat nceas:metacat (from the name)	before 3.4.2	CNA record

References

https://github.com/NCEAS/metacat/security/advisories/GHSA-57g5-qq6w-7jr8x-refsource-confirm
https://github.com/NCEAS/metacat/pull/2319x-refsource-misc
https://github.com/NCEAS/metacat/commit/d500306188881d768b93f189bb8ddbf090f3f1ecx-refsource-misc
https://github.com/NCEAS/metacat/releases/tag/3.4.2x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.