Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Apache Solr versions 6.0.0 through 8.11.2 and 9.0.0 before 9.4.1 are vulnerable. Solr ConfigSets accepted uploaded Java jar and class files, and when a collection was backed up to a directory on Solr's classpath, those files could be loaded for any ConfigSet. With authorization enabled, the impact is limited to users who already hold Backup permissions and can add libraries; the source does not say what an attacker can do without authorization. Upgrade to Solr 8.11.3 or 9.4.1, which fix the issue.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 8.8 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS 0.84, the 99th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:18 UTC First seen by agentprime
- 31 Oct 2026, 14:18 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-37vr-vmg4-jwpw
- OSV: GHSA-37vr-vmg4-jwpw
- nvd.nist.gov/vuln/detail/CVE-2023-50386
- github.com/apache/lucene-solr/commit/6c8f24eb9e3fe1cb19058173f2e221de3febfeda
- github.com/apache/lucene-solr/commit/7e9a2e67f812032a049836c3aa0b18bf5cd717f9
- github.com/apache/solr/commit/644dd3a6d6780d71030f7070754d2f3adce22859
- github.com/apache/solr/commit/c79011e81dada2f9bc4b4df32ffb32152ef81152
- issues.apache.org/jira/browse/SOLR-16949
- solr.apache.org/security.html#cve-2023-50386-apache-solr-backuprestore-apis-allow-for-deployment-of-executables-in-malicious-configsets
- www.openwall.com/lists/oss-security/2024/02/09/1