Vulnerability in Bigbluebutton
CVE-2026-46351
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-we…
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Bigbluebutton — versions < 3.0.21
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-46351?
- CVE-2026-46351 is a high-severity vulnerability in Bigbluebutton, classified under Use of Insufficiently Random Values. CVSS score: 8.1/10. Published 2026-07-16.
- How severe is CVE-2026-46351?
- High severity. CVSS v3 base score is 8.1 out of 10.