{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-84641",
        "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
        "state": "PUBLISHED",
        "assignerShortName": "mozilla",
        "dateReserved": "2026-09-01T21:33:07.129Z",
        "datePublished": "2026-09-01T21:33:07.410Z",
        "dateUpdated": "2026-09-01T21:44:15.877Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "product": "Thunderbird",
                    "vendor": "Mozilla",
                    "versions": [
                        {
                            "status": "unaffected",
                            "version": "140.15",
                            "lessThanOrEqual": "140.*",
                            "versionType": "rpm"
                        },
                        {
                            "status": "unaffected",
                            "version": "153.2",
                            "lessThanOrEqual": "153.*",
                            "versionType": "rpm"
                        },
                        {
                            "status": "unaffected",
                            "version": "155",
                            "lessThanOrEqual": "*",
                            "versionType": "rpm"
                        }
                    ]
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "A malicious IMAP server can trigger use-after-free and heap-memory disclosure by sending a crafted ID response. Heap contents can ultimately be persisted to prefs.js. This vulnerability was fixed in Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.",
                    "supportingMedia": [
                        {
                            "type": "text/html",
                            "base64": false,
                            "value": "A malicious IMAP server can trigger use-after-free and heap-memory disclosure by sending a crafted ID response. Heap contents can ultimately be persisted to prefs.js. This vulnerability was fixed in Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2."
                        }
                    ]
                }
            ],
            "title": "Information disclosure due to malicious IMAP server response",
            "references": [
                {
                    "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2057805"
                },
                {
                    "url": "https://www.mozilla.org/security/advisories/mfsa2026-86/"
                },
                {
                    "url": "https://www.mozilla.org/security/advisories/mfsa2026-87/"
                },
                {
                    "url": "https://www.mozilla.org/security/advisories/mfsa2026-88/"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "ABDULAZIZ ALASAIQAH"
                }
            ],
            "providerMetadata": {
                "orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
                "shortName": "mozilla",
                "dateUpdated": "2026-09-01T21:44:15.877Z"
            }
        }
    }
}