CVE-2026-58214
4.3 · MEDIUMOverview
CVE-2026-58214 is a medium-severity vulnerability affecting linuxfoundation nats-server. It was published on July 8, 2026 and has a CVSS 3.1 base score of 4.3 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
NATS Server is a high-performance server for NATS.io, the cloud and edge native messaging system. Prior to 2.14.3 and 2.12.12, an authenticated MQTT client could subscribe to the internal $MQTT.deliver.pubrel subject family, bypassing configured subscribe permissions and exposing MQTT QoS2 protocol metadata for sessions in the account. This issue is fixed in versions 2.14.3 and 2.12.12.
Remediation
Check the references section for vendor advisories and patches from linuxfoundation. Update nats-server to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| linuxfoundation | nats-server | >= 0, < 2.12.12 | Affected |
References
Frequently Asked Questions
What is CVE-2026-58214?
CVE-2026-58214 is a medium-severity vulnerability affecting linuxfoundation nats-server. It was published on July 8, 2026 and has a CVSS 3.1 base score of 4.3 (MEDIUM).
How severe is CVE-2026-58214?
This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2026-58214?
Check the references section for vendor advisories and patches from linuxfoundation. Update nats-server to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-58214?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-58214 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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AI agents map your attack surface to find vulnerabilities like this one.
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