{"id":"CVE-2026-118174","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-118174","generatedAt":"2026-10-28T02:24:27.433Z","title":"A sender could mark the attachment as an external attachment pointing to an arbitrary URL, which Thunderbird then loaded without any user interaction, bypassing remote content blocking.","description":"When a message containing an OpenPGP key attachment was displayed, Thunderbird automatically loaded the attachment's content to offer importing the key. A sender could mark the attachment as an external attachment pointing to an arbitrary URL, which Thunderbird then loaded without any user interaction, bypassing remote content blocking. On Windows, a URL pointing to an attacker-controlled network share could leak the user's NTLM credentials.\nThe NTLM credential leak only affects Thunderbird on Windows. On other operating systems, the issue allowed a remote request that bypassed remote content blocking. This vulnerability was fixed in Thunderbird 159 and Thunderbird 153.6.","published":"2026-10-27T19:17:29.000Z","lastModified":"2026-10-27T19:17:29.000Z","status":"Received","sourceIdentifier":"security@mozilla.org","cvss":null,"cwe":[],"affected":[],"epss":null,"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"unknown","text":"Not yet scored. NVD analysis is pending; check back once CVSS and EPSS values are published."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-27T19:17:29.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-10-27T19:17:29.037Z"},"summary":"New CVE, not yet scored."}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2080910","source":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-121/","source":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-122/","source":"security@mozilla.org"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-118174","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}