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CVE-2026-46351

HIGH
8.1
CVSS 3.1
Description
BigBlueButton is an open-source virtual classroom. Prior to 3.0.21, bbb-web generated conference sessionToken values with insufficiently secure randomness in bbb-common-web/src/main/java/org/bigbluebutton/api/Util.java and bigbluebutton-web/grails-app/controllers/org/bigbluebutton/web/controllers/ApiController.groovy, allowing a session user to predict other users' conference session tokens and impersonate them. This issue is fixed in version 3.0.21.

Metadata

CVE ID
CVE-2026-46351
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-05-13 18:37 UTC
Published
2026-07-16 17:58 UTC
Last updated
2026-07-16 18:05 UTC
Primary CWE
CWE-330
CWE-330: Use of Insufficiently Random Values
Vendor / Product
bigbluebutton / bigbluebutton
Sources
cve.org  ·  NVD

Severity & Metrics

8.1 HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Affected products (1)
VendorProductPlatformVersions
bigbluebutton bigbluebutton — < 3.0.21
Weakness (CWE)
CWESourceDescription
CWE-330 cna CWE-330: Use of Insufficiently Random Values
CVSS scores (1)
ScoreSeverityVersionSourceVector
8.1 HIGH 3.1 cna CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
References (3)
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