CVE-2026-56345Network attack vector

Account takeover via filename-derived passwordless login

Published Jun 20, 2026 · Updated Jun 20, 2026

Authorization bypass in AVideo 29.0 and earlier allows remote attackers with the Meet shared secret to hijack any user session. The Meet uploadRecordedVideo.json.php endpoint parses users_id from an uploaded filename and passes it to passwordless User->login() without verifying ownership. Possession of the Meet shared secret is required; a crafted upload can mint an authenticated session for any account, including an administrator.

CVSS severity9.2
Critical
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in AVideo 29.0 and earlier allows remote attackers with the Meet shared secret to hijack any user session. The Meet uploadRecordedVideo.json.php endpoint parses users_id from an uploaded filename and passes it to passwordless User->login() without verifying ownership. Possession of the Meet shared secret is required; a crafted upload can mint an authenticated session for any account, including an administrator.

The record

CVE
CVE-2026-56345
Published
Jun 20, 2026
Updated
Jun 20, 2026
Vendor
World Wide Broadcast Network
Product
AVideo
Classifications
CWE-287, T1550.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=29.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

World Wide Broadcast Network · AVideoversion=0 <=29.0

Published CVSS scores

9.2VulnCheckCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.1VulnCheckCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1550.004Use Alternate Authentication Material: Web Session Cookie

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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