{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-46351",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-05-13T18:37:30.991Z",
        "datePublished": "2026-07-16T17:58:53.070Z",
        "dateUpdated": "2026-07-17T13:59:11.141Z"
    },
    "containers": {
        "cna": {
            "title": "BigBlueButton: Insecure Randomness allows to guess user's conference session token and impersonate them",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-330",
                            "lang": "en",
                            "description": "CWE-330: Use of Insufficiently Random Values",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "NONE",
                        "baseScore": 8.1,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "LOW",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-7959-pf2v-xc4h",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-7959-pf2v-xc4h"
                },
                {
                    "name": "https://github.com/bigbluebutton/bigbluebutton/commit/8457886c248aeba5597ee8749267602d6d117e98",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/bigbluebutton/bigbluebutton/commit/8457886c248aeba5597ee8749267602d6d117e98"
                },
                {
                    "name": "https://github.com/bigbluebutton/bigbluebutton/releases/tag/v3.0.21",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/bigbluebutton/bigbluebutton/releases/tag/v3.0.21"
                }
            ],
            "affected": [
                {
                    "vendor": "bigbluebutton",
                    "product": "bigbluebutton",
                    "versions": [
                        {
                            "version": "< 3.0.21",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-07-16T18:05:24.665Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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."
                }
            ],
            "source": {
                "advisory": "GHSA-7959-pf2v-xc4h",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-07-17T13:59:01.121165Z",
                                "id": "CVE-2026-46351",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-07-17T13:59:11.141Z"
                }
            }
        ]
    }
}