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CVE-2026-116679— Neko: Authorization bypass in legacy WebRTC input handling

Quick assessment

Affected
m1k1o neko
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Neko 是一个基于 Docker 运行并使用 WebRTC 技术的自托管虚拟浏览器。在从 3.0.0 到 3.1.5 的版本中，当部署启用了“传统模式（legacy mode）”和 配置时，由于 函数错误地评估了主机状态，导致传统 WebRTC 数据通道的输入被错误授权。因此，任何已认证的房间成员在建立 WebRTC 连接后，均可通过传统控制通道发送鼠标和键盘事件，即便此时控制功能已被锁定，或该成员在现代控制 API 下未被授权。该问题已在 3.1.5 版本中修复。

CVSS 5.4 · Medium

Affected Version Matrix 1

VendorProduct Version RangeStatus
m1k1o neko >= 3.0.0, < 3.1.5 affected
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I. Basic Information for CVE-2026-116679

Vulnerability Information
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Vulnerability Title
Neko: Authorization bypass in legacy WebRTC input handling
Source: CVE Program / CVE List V5
Vulnerability Description
Neko is a a self-hosted virtual browser that runs in Docker and uses WebRTC. From version 3.0.0 until 3.1.5, Neko deployments with legacy mode and session.implicit_hosting enabled incorrectly authorize legacy WebRTC data-channel input because LegacyIsHost() evaluates host status incorrectly. An authenticated room member who establishes a WebRTC connection can send mouse and keyboard events through the legacy control channel while controls are locked or the member is otherwise unauthorized by the modern control API. This issue is fixed in version 3.1.5.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
m1k1o neko >= 3.0.0, < 3.1.5 -

II. Public POCs for CVE-2026-116679

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III. Intelligence Information for CVE-2026-116679

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Other References for CVE-2026-116679 (4)

IV. Related Vulnerabilities

Same product: neko
Same vendor: m1k1o
Same weakness: CWE-863