---
id: CVE-2026-50022
title: >-
  Metacat is data repository software that helps researchers preserve, share,
  and discover data
summary: >-
  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/v…
severity: medium
cvss: 5.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N'
cwe:
  - CWE-441
vendor: NCEAS
product: metacat
affected:
  - metacat < 3.4.2
published: '2026-09-17'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T17:17:49.900'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-50022'
references:
  - url: >-
      https://github.com/NCEAS/metacat/commit/d500306188881d768b93f189bb8ddbf090f3f1ec
    label: security-advisories@github.com
  - url: 'https://github.com/NCEAS/metacat/pull/2319'
    label: security-advisories@github.com
  - url: 'https://github.com/NCEAS/metacat/releases/tag/3.4.2'
    label: security-advisories@github.com
  - url: 'https://github.com/NCEAS/metacat/security/advisories/GHSA-57g5-qq6w-7jr8'
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
epss: 0.00397
epssPercentile: 0.31183
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-17T20:24:03.410643Z'
ingestedAt: '2026-09-17T20:28:02.784Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.