CVE-2026-44825 Apache Solr: Enabling BasicAuth using bin/solr CLI configures additional insecure users
Remote attackers can gain full administrative access to Apache Solr clusters using hardcoded default credentials created by the BasicAuth setup tool.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-44825?
CVE-2026-44825 is a high-severity vulnerability in Apache Solr, published on 1 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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
Which versions are affected by CVE-2026-44825?
5 open source packages ship an affected version, including org.apache.solr:solr-core and solr. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.apache.solr:solr-core Maven | All versions | None |
org.apache.solr:solr-core Maven | All versions | None |
org.apache.solr:solr-core Maven | From 9.4.0 to 9.10.1 | None |
org.apache.solr:solr-core Maven | From 9.4.0 to 9.10.1 | None |
solr Bitnami | From 9.4.0 to 10.0.0 | 10.0.0 |
Products include Apache Solr.
How do I fix CVE-2026-44825?
Upgrade to a fixed version.
Is CVE-2026-44825 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44825 exists.
Public exploit code: 1 Nuclei template and 3 proofs of concept on GitHub.
Other vulnerabilities in Apache Solr
- CVE-2019-17558 Apache Solr VelocityResponseWriter Plug-In Remote Code Execution
- CVE-2019-0193 Apache Solr DataImportHandler Code Injection
- CVE-2024-45216 Apache Solr: Authentication bypass possible using a fake URL Path ending
- CVE-2021-44548 Apache Solr information disclosure vulnerability through DataImportHandler
- CVE-2021-27905 SSRF vulnerability with the Replication handler
Sources
Also known as BIT-solr-2026-44825, CLEANSTART-2026-MT16431, GHSA-qhr7-h655-pw6r, MINI-8gm8-24vv-95c9.