CVE-2026-46351

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Source
https://cve.org/CVERecord?id=CVE-2026-46351
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46351.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-46351
Aliases
  • GHSA-7959-pf2v-xc4h
Published
2026-07-16T17:58:53.070Z
Modified
2026-08-12T16:09:38.386048Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
Summary
BigBlueButton: Insecure Randomness allows to guess user's conference session token and impersonate them
Details

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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46351.json",
    "cwe_ids": [
        "CWE-330"
    ],
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/bigbluebutton/bigbluebutton

Affected ranges

Type
GIT
Repo
https://github.com/bigbluebutton/bigbluebutton
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
8457886c248aeba5597ee8749267602d6d117e98
Fixed
180cefe5727aea7493194223b1d9263f747a97ba
Database specific
Show details 
{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "3.0.21"
        }
    ]
}

Affected versions

2.*
2.2-beta-10
2.2-beta-11
2.2-beta-12
2.2-beta-14
2.2-beta-15
2.2-beta-16
2.2-beta-17
2.2-beta-18
2.2-beta-19
2.2-beta-2
2.2-beta-20
2.2-beta-21
2.2-beta-22
2.2-beta-23
2.2-beta-3
2.2-beta-4
2.2-beta-5
2.2-beta-6
2.2-beta-7
2.2-beta-8
2.2-beta-9
2.2-rc-1
2.2-rc-2
2.2-rc-3
3.*
3.0.0-rc.1
Other
dcs-2-a
v0.*
v0.8
v0.8b4
v0.8b4.0
v0.8rc2
v0.9.0-beta
v2.*
v2.3-alpha-1
v2.3-alpha-2
v2.3-alpha-3
v2.3-alpha-4
v2.3-alpha-5
v2.3-alpha-6
v2.3-alpha-7
v2.3-alpha-8
v2.3-beta-1
v2.3-beta-2
v2.3-beta-3
v2.3-beta-4
v2.3-beta-5
v2.3-rc-1
v2.3-rc-2
v2.3.0
v2.3.1
v2.4-alpha-1
v2.4-beta-1
v2.4-beta-2
v2.4-beta-3
v2.4-beta-4
v3.*
v3.0.0
v3.0.0-alpha.1
v3.0.0-alpha.2
v3.0.0-alpha.3
v3.0.0-alpha.4
v3.0.0-alpha.6
v3.0.0-alpha.7
v3.0.0-beta.1
v3.0.0-beta.2
v3.0.0-beta.3
v3.0.0-beta.4
v3.0.0-beta.5
v3.0.0-beta.6
v3.0.0-beta.7
v3.0.0-rc.1
v3.0.0-rc.2
v3.0.0-rc.3
v3.0.0-rc.4
v3.0.1
v3.0.10
v3.0.11
v3.0.12
v3.0.13
v3.0.14
v3.0.15
v3.0.16
v3.0.17
v3.0.18
v3.0.19
v3.0.2
v3.0.20
v3.0.3
v3.0.4
v3.0.5
v3.0.7
v3.0.8
v3.0.9

Database specific

vanir_signatures 
[
    {
        "id": "CVE-2026-46351-eb901e84",
        "target": {
            "file": "bbb-common-web/src/main/java/org/bigbluebutton/api/Util.java"
        },
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "107816761300497150788251538289818199915",
                "319022996089098753387531060019535594610",
                "283060141379493212096909851039163446183",
                "316656843430815293078634585412341161858",
                "336291095491640805804695097310050733012",
                "289916862819442160213376416766296423402",
                "137001160105945224794820402543128672165",
                "223163553707596551023648335031104551541",
                "275970060005458604864282566590708687784"
            ]
        },
        "signature_version": "v1",
        "source": "https://github.com/bigbluebutton/bigbluebutton/commit/8457886c248aeba5597ee8749267602d6d117e98",
        "signature_type": "Line"
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46351.json"
vanir_signatures_modified 
"2026-08-12T16:09:38Z"