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CVE-2026-46353 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:4.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CNA: [email protected]CVSS-B:8.1 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/bigbluebutton/bigbluebutton/commit/36fd1b407488a0c56ce620b91184d5a8aea68b3d	[email protected]	Source CodeVendor
https://github.com/bigbluebutton/bigbluebutton/releases/tag/v3.0.21	[email protected]	Release NotesVendor
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-43hc-5g2m-cqff	[email protected]	AdvisoryRemedyVendor

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-284	Improper Access Control	[email protected]

Affected Products

Product	Versions
BigBlueButton	< 3.0.21 (semver)
CPE cpe:2.3:a:bigbluebutton:bigbluebutton:::::::: Remediation Upgrade: 3.0.21moderate efforthttps://github.com/bigbluebutton/bigbluebutton/releases/tag/v3.0.21

Change History

2 change records found show changes

Date	Action	Recorded By
Jul 16, 2026	New CVE Received	[email protected]
Jul 16, 2026	CVE Modified	CISA-ADP