Staging Environment: Content and features may be unstable or change without notice.
Advisory details: github_osv / GHSA-vc2w-4v3p-2mqw
Advisory ID github_osv/GHSA-vc2w-4v3p-2mqw
Aliases CVE-2026-22444
Summary Apache Solr: Insufficient file-access checking in standalone core-creation requests The "create core" API of Apache Solr 8.6 through 9.10.0 lacks sufficient input validation on some API parameters, which can cause Solr to check the existence of and attempt to read file-system paths that should be disallowed by Solr's "allowPaths" security setting https://https://solr.apache.org/guide/solr/latest/configuration-guide/configuring-solr-xml.html#the-solr-element .  These read-only accesses can allow users to create cores using unexpected configsets if any are accessible via the filesystem.  On Windows systems configured to allow UNC paths this can additionally cause disclosure of NTLM "user" hashes.  Solr deployments are subject to this vulnerability if they meet the following criteria: * Solr is running in its "standalone" mode. * Solr's "allowPath" setting is being used to restrict file access to certain directories. * Solr's "create core" API is exposed and accessible to untrusted users.  This can happen if Solr's RuleBasedAuthorizationPlugin https://solr.apache.org/guide/solr/latest/deployment-guide/rule-based-authorization-plugin.html is disabled, or if it is enabled but the "core-admin-edit" predefined permission (or an equivalent custom permission) is given to low-trust (i.e. non-admin) user roles. Users can mitigate this by enabling Solr's RuleBasedAuthorizationPlugin (if disabled) and configuring a permission-list that prevents untrusted users from creating new Solr cores.  Users should also upgrade to Apache Solr 9.10.1 or greater, which contain fixes for this issue.
Status Published
Exploitability 0.5
Weighted Severity 6.4
Risk 3.2
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (1)
CWE-20 Improper Input Validation
System Score Found at
cvssv3.1 7.1 https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/01/GHSA-vc2w-4v3p-2mqw/GHSA-vc2w-4v3p-2mqw.json
generic_textual HIGH
Reference id Reference type URL
https://github.com/apache/solr
https://issues.apache.org/jira/browse/SOLR-18058
https://lists.apache.org/thread/qkrb9dd4xrlqmmq73lrhkbfkttto2d1m
http://www.openwall.com/lists/oss-security/2026/01/20/5
CVE-2026-22444 https://nvd.nist.gov/vuln/detail/CVE-2026-22444
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N Found at https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/01/GHSA-vc2w-4v3p-2mqw/GHSA-vc2w-4v3p-2mqw.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-01-21T15:38:26Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/22xxx/CVE-2026-22444.json

Source Advisory: vulnrichment/CVE-2026-22444

View SSVC decision tree 
[{'Exploitation': 'none'},
 {'Automatable': 'no'},
 {'Technical Impact': 'partial'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]