Vulnerability Description
NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, users with JetStream admin API access to restore one stream could restore to other stream names, impacting data which should have been protected against them. Versions 2.11.15 and 2.12.6 contain a fix. As a workaround, if developers have configured users to have limited JetStream restore permissions, temporarily remove those permissions.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linuxfoundation | Nats-Server | < 2.11.15 |
Related Weaknesses (CWE)
References
- https://advisories.nats.io/CVE/secnote-2026-12.txtMitigationVendor Advisory
- https://github.com/nats-io/nats-server/security/advisories/GHSA-9983-vrx2-fg9cMitigationVendor Advisory
FAQ
What is CVE-2026-33222?
CVE-2026-33222 is a vulnerability with a CVSS score of 4.9 (MEDIUM). NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, users with JetStream admin API access to restore one stream could ...
How severe is CVE-2026-33222?
CVE-2026-33222 has been rated MEDIUM with a CVSS base score of 4.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-33222?
Check the references section above for vendor advisories and patch information. Affected products include: Linuxfoundation Nats-Server.