Description
Hardcoded credentials in the Basic Authentication setup tool (bin/solr auth enable) in Apache Solr versions 9.4.0 through 9.10.1 and 10.0.0 allows a remote attacker to gain full administrative access to the cluster via publicly known default credentials installed silently alongside the user-specified account.
As an immediate workaround without upgrading, delete the template users (superadmin, admin, search, index) from security.json or change their passwords. The future, not yet released, versions 9.11.0 and 10.1.0 will not be vulnerable, and it will be enough to upgrade to solve the issue.
Not affected: * Clusters where bin/solr auth enable was not used to bootstrap BasicAuth * Clusters where template users have been assigned strong passwords after bootstrap
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Apache Software Foundation | Apache Solr | >= 9.4.0, <= 9.10.1; 10.0.0 |
References
- https://lists.apache.org/thread/5xg6xr99glocp3zsg9ht2zlbwlrst7chMailing List, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/05/29/6Mailing List, Third Party Advisory
Timeline
- Published
- Jun 1, 2026
- Last modified
- Jul 22, 2026
- NVD status
- Analyzed