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

Status: published. Published: 2026-10-31. Updated: 2026-11-02.

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.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/gnmyt/Nexterm/pull/1950
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/gnmyt/Nexterm/commit/00fdb03eea35adb3dee8169469e897b3c8f30657

## Affected products and versions

- gnmyt / Nexterm: ≥ 1.0.6-OPEN-PREVIEW; ≤ 1.2.2-BETA (affected, custom). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 5.3 (medium); 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; source: CNA: VulnCheck

- CVSS 3.1: 5.4 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: 0.23% as of 2026-11-02; percentile 13.50%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-639

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/gnmyt/Nexterm/issues/1944 (CNA: VulnCheck; issue-tracking)

- https://github.com/gnmyt/Nexterm/pull/1950 (CNA: VulnCheck; issue-tracking, patch)

- https://github.com/gnmyt/Nexterm/commit/00fdb03eea35adb3dee8169469e897b3c8f30657 (CNA: VulnCheck; patch)

- https://github.com/gnmyt/Nexterm/blob/v1.2.2-BETA/server/routes/serverSession.js#L87 (CNA: VulnCheck; technical-description)

- https://github.com/gnmyt/Nexterm (CNA: VulnCheck; product)

- https://www.vulncheck.com/advisories/nexterm-through-1.2.2-beta-missing-authorization-in-server-session-lifecycle-routes (CNA: VulnCheck; third-party-advisory)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-120200; retrieved 2026-11-02; source updated 2026-11-02

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-120200; retrieved 2026-11-02; source updated Not reported

Revision: 6893131049c8899ef9388a56d66ac5790132c97d67bae20d21d0cb5b82b8be5d

Canonical: https://y2.dev/cve/CVE-2026-120200

## Agent and API access

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- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

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