CVE-2026-40911: WWBN AVideo is an open source video platform

Q: How do I fix CVE-2026-40911?

avideo: upgrade to newer than 29.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-40911 being exploited?

CVE-2026-40911 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-40911 affect?

CVE-2026-40911 affects avideo. Severity is critical (CVSS 10.0). WWBN AVideo is an open source video platform. In versions 29.0 and prior, the YPTSocket plugin's WebSocket server relays attacker-supplied JSON message bodies to every connected client without sanitizing the `msg` or `callback` fields. On t

Q: How urgent is CVE-2026-40911?

Priority 61/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

This week

CRITICAL 10.0REMOTEUPGRADE

CVE-2026-40911 is a critical-severity flaw (CVSS 10.0) affecting avideo. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

WWBN AVideo is an open source video platform. In versions 29.0 and prior, the YPTSocket plugin's WebSocket server relays attacker-supplied JSON message bodies to every connected client without sanitizing the `msg` or `callback` fields. On the client side, `plugin/YPTSocket/script.js` contains two `eval()` sinks fed directly by those relayed fields (`json.msg.autoEvalCodeOnHTML` at line 568 and `json.callback` at line 95). Because tokens are minte

Why this priority

Critical severity
Public exploit reference
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 49%)
CISA exploited list	No
Weakness	CWE-94
Published	2026-04-21
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: wwbn

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-21 21:16 UTCPublished CVE record published
2026-10-26 22:10 UTCUpdated Record last modified

wwbn avideo UPGRADE

Affected: <= 29.0

Fixed in: newer than 29.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy avideo || rpm -q avideo || avideo --version

2. UPGRADE to newer than 29.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade avideo

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade avideo

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Composer (PHP) · wwbn/avideo · NO FIX YET · vulnerable: <= 29.0 · source

Fedora ELN · openbao · FIXED · 2.6.5-1.eln159 · FEDORA-2026-77adf886ae · source

sudo dnf upgrade --advisory=FEDORA-2026-77adf886ae

Fedora 46 · sugar-turtleart · FIXED · 220-16.fc46 · FEDORA-2026-b79483c788 · source

sudo dnf upgrade --advisory=FEDORA-2026-b79483c788

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: github.com/WWBN/AVideo/security/advisories/GHSA-gph2-j4c9-vhhr

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-40911?

avideo: upgrade to newer than 29.0. Exact commands for each OS are on this page.

Is CVE-2026-40911 being exploited?

CVE-2026-40911 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-40911 affect?

CVE-2026-40911 affects avideo. Severity is critical (CVSS 10.0). WWBN AVideo is an open source video platform. In versions 29.0 and prior, the YPTSocket plugin's WebSocket server relays attacker-supplied JSON message bodies to every connected client without sanitizing the `msg` or `callback` fields. On t

How urgent is CVE-2026-40911?

Priority 61/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-41304 CRITICAL 9.8 UPGRADE WWBN AVideo is an open source video platform
CVE-2026-34374 CRITICAL 9.1 UPGRADE WWBN AVideo is an open source video platform
CVE-2026-33767 HIGH 8.8 UPGRADE WWBN AVideo is an open source video platform
CVE-2026-41062 MEDIUM 6.5 UPGRADE WWBN AVideo is an open source video platform
CVE-2026-33761 MEDIUM 5.3 UPGRADE WWBN AVideo is an open source video platform

References

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