Incorrect authorization in nats-server - CVE-2026-33249
Published: April 22, 2026
Vulnerability identifier: #VU126844
CSH Severity: Medium
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-33249
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass authorization process.
The vulnerability exists due to incorrect authorization. A remote user can redirect message tracing to arbitrary subject.
Affected software
nats-server
How to mitigate CVE-2026-33249
Install updates from vendor's website.
nats-server - addressed in versions 2.11.15, 2.12.6