Auth bypass in Gnmyt Nexterm
CVE-2026-120200
Nexterm through 1.2.2-BETA contains a missing authorization vulnerability that allows authenticated users to hibernate, resume, or terminate other users' remote sessions via session lifecycle routes. Attackers who obtain a session ID can call the hibernate, resume, or DELETE connection endpoints to disrupt live SSH, RDP, VNC, or SFTP sessions.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/gnmyt/Nexterm/issues/1944 (issue-tracking)
- github.com/gnmyt/Nexterm/pull/1950 (issue-tracking, patch)
- github.com/gnmyt/Nexterm/commit/00fdb03eea35adb3dee8169469e897b3c8f30657 (patch)
- github.com/gnmyt/Nexterm/blob/v1.2.2-BETA/server/routes/serverSession.js (technical-description)
- github.com/gnmyt/Nexterm (product)
- www.vulncheck.com/advisories/nexterm-through-1.2.2-beta-missing-authorization-i… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-120200?
- CVE-2026-120200 is a medium-severity vulnerability in Gnmyt Nexterm, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.4/10. Published 2026-10-31.
- How severe is CVE-2026-120200?
- Medium severity. CVSS v3 base score is 5.4 out of 10.