{"id":"CVE-2026-118177","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-118177","generatedAt":"2026-10-28T01:12:07.401Z","title":"A malicious server, or a network attacker when the lookup used plain HTTP, could make Thunderbird subscribe to such a location.","description":"When looking for calendars in a directory on a server, during account setup or when adding a new network calendar, Thunderbird accepted calendar locations pointing to other servers, local files or network shares. A malicious server, or a network attacker when the lookup used plain HTTP, could make Thunderbird subscribe to such a location. On Windows this could leak the user's NTLM credentials to an attacker-controlled host on every calendar refresh, and changes to the calendar could be written to the attacker's share or overwrite a local file. 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":"2026-10-27T19:17:29.370Z"},"summary":"New CVE, not yet scored."}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2080924","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-2026-118177","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."}