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Java CVE-2026-46353

| EUVDEUVD-2026-44998 HIGH
Improper Access Control (CWE-284)
2026-07-16 GitHub_M
Authentication Bypass Java Bigbluebutton
8.1
CVSS 3.1 · Vendor: GitHub_M
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Severity by source

Vendor (GitHub_M) PRIMARY
8.1 HIGH
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Primary rating from Vendor (GitHub_M) · only source for this CVE.

CVSS VectorVendor: GitHub_M

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

Lifecycle Timeline

4
Patch available
Jul 16, 2026 - 20:48 EUVD
Source Code Evidence Fetched
Jul 16, 2026 - 18:48 vuln.today
Analysis Generated
Jul 16, 2026 - 18:48 vuln.today
CVE Published
Jul 16, 2026 - 18:06 cve.org
HIGH 8.1

DescriptionCVE.org

BigBlueButton is an open-source virtual classroom. Prior to 3.0.21, bbb-web checksum validation could be bypassed when a presentationUploadExternalUrl parameter was supplied to API request handling in CreateMeeting.java and ValidationService.java, allowing a user to send valid requests to some endpoints without a checksum. This issue is fixed in version 3.0.21.

AnalysisAI

Authentication/access-control bypass in BigBlueButton's bbb-web component (versions prior to 3.0.21) lets remote attackers reach protected API endpoints without a valid checksum by supplying the presentationUploadExternalUrl parameter. BigBlueButton's API is normally guarded by a shared-secret checksum, so bypassing it undermines the core authorization mechanism for calls such as CreateMeeting. …

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CVE-2026-46353 vulnerability details – vuln.today
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