Metacat acts as unintended proxy to backend Apache SOLR engine

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-50022
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 21:17:13 UTC
Updated2026-09-17 21:17:13 UTC
DescriptionMetacat 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.

Risk And Classification

Primary CVSS: v3.1 5.8 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

EPSS: 0.002910000 probability, percentile 0.219170000 (date 2026-09-20)

Problem Types: CWE-441 | CWE-441 CWE-441: Unintended Proxy or Intermediary ('Confused Deputy')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.8MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
3.1CNADECLARED5.8MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA NCEAS Metacat affected < 3.4.2 Not specified

References

ReferenceSourceLinkTags
github.com/NCEAS/metacat/commit/d500306188881d768b93f189bb8ddbf090f3f1ec [email protected] github.com
github.com/NCEAS/metacat/security/advisories/GHSA-57g5-qq6w-7jr8 [email protected] github.com
github.com/NCEAS/metacat/releases/tag/3.4.2 [email protected] github.com
github.com/NCEAS/metacat/pull/2319 [email protected] github.com
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