{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-103500",
        "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
        "state": "PUBLISHED",
        "assignerShortName": "mozilla",
        "dateReserved": "2026-09-30T17:15:06.146Z",
        "datePublished": "2026-09-30T17:15:06.357Z",
        "dateUpdated": "2026-10-21T17:24:51.272Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "product": "Thunderbird",
                    "vendor": "Mozilla",
                    "versions": [
                        {
                            "status": "unaffected",
                            "version": "140.17",
                            "lessThanOrEqual": "140.*",
                            "versionType": "rpm"
                        },
                        {
                            "status": "unaffected",
                            "version": "153.4",
                            "lessThanOrEqual": "153.*",
                            "versionType": "rpm"
                        },
                        {
                            "status": "unaffected",
                            "version": "157",
                            "lessThanOrEqual": "*",
                            "versionType": "rpm"
                        }
                    ]
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "An attacker could cause a heap buffer overflow by getting a user to open an email that is greater than or equal to 2GB in size. This vulnerability was fixed in Thunderbird 157, Thunderbird 140.17, and Thunderbird 153.4.",
                    "supportingMedia": [
                        {
                            "type": "text/html",
                            "base64": false,
                            "value": "An attacker could cause a heap buffer overflow by getting a user to open an email that is greater than or equal to 2GB in size. This vulnerability was fixed in Thunderbird 157, Thunderbird 140.17, and Thunderbird 153.4."
                        }
                    ]
                }
            ],
            "title": "Heap buffer overflow opening large email",
            "references": [
                {
                    "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2070267"
                },
                {
                    "url": "https://www.mozilla.org/security/advisories/mfsa2026-101/"
                },
                {
                    "url": "https://www.mozilla.org/security/advisories/mfsa2026-102/"
                },
                {
                    "url": "https://www.mozilla.org/security/advisories/mfsa2026-103/"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Ahmed Albalawi"
                }
            ],
            "providerMetadata": {
                "orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
                "shortName": "mozilla",
                "dateUpdated": "2026-10-21T17:24:51.272Z"
            }
        },
        "adp": [
            {
                "problemTypes": [
                    {
                        "descriptions": [
                            {
                                "type": "CWE",
                                "cweId": "CWE-122",
                                "lang": "en",
                                "description": "CWE-122 Heap-based Buffer Overflow"
                            }
                        ]
                    }
                ],
                "metrics": [
                    {
                        "cvssV3_1": {
                            "scope": "UNCHANGED",
                            "version": "3.1",
                            "baseScore": 6.3,
                            "attackVector": "NETWORK",
                            "baseSeverity": "MEDIUM",
                            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L",
                            "integrityImpact": "LOW",
                            "userInteraction": "REQUIRED",
                            "attackComplexity": "LOW",
                            "availabilityImpact": "LOW",
                            "privilegesRequired": "NONE",
                            "confidentialityImpact": "LOW"
                        }
                    },
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-10-16T18:33:49.871087Z",
                                "id": "CVE-2026-103500",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-10-16T18:34:02.102Z"
                }
            }
        ]
    }
}