CVE-2026-103500

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{"bugzilla": {"description": "thunderbird: thunderbird: Heap buffer overflow via opening large emails", "id": "2544154", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2544154"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A flaw was found in Thunderbird. A remote attacker could exploit this vulnerability by convincing a user to open an email that is 2GB or larger, triggering a heap buffer overflow. This flaw allows an attacker to corrupt memory, which may cause an application crash, resulting in a Denial of Service (DoS), or potentially lead to arbitrary code execution."], "name": "CVE-2026-103500", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-09-30T17:15:06Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-103500\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-103500\nhttps://bugzilla.mozilla.org/show_bug.cgi?id=2070267\nhttps://www.mozilla.org/security/advisories/mfsa2026-101/"], "threat_severity": "Important"}

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