GHSA-2gw9-c2r2-f5qf · Severity: high · Ecosystem: go — Neko has a Self-service Privilege Escalation for Authenticated Users
Neko is a a self-hosted virtual browser that runs in Docker and uses WebRTC In versions 3.0.0 through 3.0.10 and 3.1.0 through 3.1.1, any authenticated user can immediately obtain full administrative control of the entire Neko instance (member management, room settings, broadcast control, session termination, etc.). This results in a complete compromise of the instance. The vulnerability has been patched in v3.0.11 and v3.1.2. If upgrading is not immediately possible, the following mitigations can reduce risk: Restrict access to trusted users only (avoid granting accounts to untrusted parties); ensure all user passwords are strong and only shared with trusted individuals; run the instance only when needed; avoid leaving it continuously exposed; place the instance behind authentication layers such as a reverse proxy with additional access controls; disable or restrict access to the /api/profile endpoint if feasible; and/or monitor for suspicious privilege changes or unexpected administrative actions. Note that these are temporary mitigations and do not fully eliminate the vulnerability. Upgrading is strongly recommended.
Conclusion & alert: CVE-2026-39386 is rated Moderate Risk (47.7/100): CVSS High severity, with low exploitation likelihood (EPSS 0.44%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.05% | 0.44% | +0.39% |
| 2 | 2026-05-23 | 0.05% | 0.05% | +0.01% |
| 3 | 2026-04-22 | — | 0.05% | — |
Full EPSS history (4 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 8.8 | 3.1 | HIGH |
|
2.8 | 5.9 | [email protected] |
GHSA-2gw9-c2r2-f5qf · Severity: high · Ecosystem: go — Neko has a Self-service Privilege Escalation for Authenticated Users
| URL | Tags |
|---|---|
| https://github.com/m1k1o/neko/releases/tag/v3.0.11 | Product |
| https://github.com/m1k1o/neko/releases/tag/v3.1.2 | Product |
| https://github.com/m1k1o/neko/security/advisories/GHSA-2gw9-c2r2-f5qf | Mitigation Vendor Advisory |