GHSA-gph2-j4c9-vhhr: wwbn/avideo (CVE-2026-40911)

WWBN AVideo YPTSocket WebSocket Broadcast Relay Leads to Unauthenticated Cross-User JavaScript Execution via Client-Side eval() Sinks

CVSS 10.0 CriticalCriticalEPSS 0.0065 · 51st percentile

Critical, because:

CVSS score 10.0: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 14 Apr 2026, 22:50 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
wwbn/avideo	Packagist	<=29.0	No fixed version yet

Identifiers

GHSA-gph2-j4c9-vhhr · CVE-2026-40911 · PKSA-zr2c-vrf1-x6qy

Weakness (CWE)

CWE-94

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

AVideo (wwbn/avideo) versions 29.0 and earlier, with the YPTSocket plugin enabled, let anonymous visitors broadcast JavaScript that runs in the browsers of all connected users, including administrators. This can lead to session theft and privileged actions on behalf of those users. No fixed version is listed; disabling the YPTSocket plugin removes this exposure.

Written 3 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
10.0	Critical	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0065, the 51st percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:25 UTC First seen by agentprime
31 Oct 2026, 14:25 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.