Improper Authentication in nats-server - CVE-2026-33248
Published: April 22, 2026
Vulnerability identifier: #VU126857
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-33248
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: NATS - The Cloud Native Messaging System
Affected software:
nats-server
nats-server
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to incorrect Subject DN matching. A remote attacker can bypass authentication process and gain unauthorized access to the application.
How to mitigate CVE-2026-33248
Install updates from vendor's website.