GHSA-vc2w-4v3p-2mqw · Severity: high · Ecosystem: maven — 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.
Conclusion & alert: CVE-2026-22444 is rated Moderate Risk (45.2/100): CVSS High severity, with low exploitation likelihood (EPSS 0.65%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.03% | 0.65% | +0.63% |
| 2 | 2026-02-18 | 0.05% | 0.03% | -0.02% |
| 3 | 2026-01-27 | — | 0.05% | — |
Full EPSS history (4 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.1 | 3.1 | HIGH |
|
2.8 | 4.2 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
GHSA-vc2w-4v3p-2mqw · Severity: high · Ecosystem: maven — Apache Solr: Insufficient file-access checking in standalone core-creation requests
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2026-22444 unimportant priority: Debian including 1 source packages (lucene-solr), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2026-22444 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2026-22444 |
ubuntu
|
medium | CVE-2026-22444 medium priority: Ubuntu including 1 source packages (lucene-solr), 8 status rows across 8 suites (bionic, focal, jammy, noble, questing, trusty, upstream, xenial): needs-triage 7, not-affected 1. | https://ubuntu.com/security/CVE-2026-22444 |
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/qkrb9dd4xrlqmmq73lrhkbfkttto2d1m | Mailing List |
| http://www.openwall.com/lists/oss-security/2026/01/20/5 | Mailing List |