Medium 5.4Published Oct 27, 2026

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

Updated under an hour ago (Oct 29, 2026, 8:40 PM ET)

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No exploitation reported and no EPSS estimate yet.

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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.

CVSS: 5.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Weakness (CWE): CWE-863
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Oct 28, 2026
First seen by InfoSec Signals: Oct 27, 2026

Affected products

Affected products

m1k1o neko m1k1o:neko (from the name)	from 3.0.0, < 3.1.5	CNA record

References

References

https://github.com/m1k1o/neko/security/advisories/GHSA-5cp7-fp4j-wwcv	x-refsource-confirm
https://github.com/m1k1o/neko/pull/675	x-refsource-misc
https://github.com/m1k1o/neko/commit/395ca1a6f62b7b0e270e654d366a2d57b8042efd	x-refsource-misc
https://github.com/m1k1o/neko/releases/tag/v3.1.5	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.