CVE-2026-46404Network attack vector

Private-network data access via redirectable presentation URLs

Published Jul 16, 2026 · Updated Jul 16, 2026

SSRF in presentation URL handling in BigBlueButton before 3.0.23 allows remote authenticated users to access private network assets. PresentationUrlDownloadService followed redirects without pinning validated DNS results, allowing a destination to change between validation and retrieval. High-privilege access is required; successful requests expose private-address resources without data modification or service interruption.

CVSS severity6.8
Medium
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in presentation URL handling in BigBlueButton before 3.0.23 allows remote authenticated users to access private network assets. PresentationUrlDownloadService followed redirects without pinning validated DNS results, allowing a destination to change between validation and retrieval. High-privilege access is required; successful requests expose private-address resources without data modification or service interruption.

The record

CVE
CVE-2026-46404
Published
Jul 16, 2026
Updated
Jul 16, 2026
Vendor
BigBlueButton Inc.
Product
BigBlueButton
Classifications
CWE-918
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jul 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 16, 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=< 3.0.23

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

BigBlueButton Inc. · BigBlueButtonversion=< 3.0.23

Published CVSS scores

6.8GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)

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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