{"id":"CVE-2026-109742","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-109742","generatedAt":"2026-10-27T23:59:03.895Z","title":"Information disclosure in the PDF Viewer component.","description":"Information disclosure in the PDF Viewer component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.","published":"2026-10-13T13:17:25.000Z","lastModified":"2026-10-13T19:18:38.000Z","status":"Deferred","sourceIdentifier":"security@mozilla.org","cvss":{"version":"3.1","score":4.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N"},"cwe":["CWE-200"],"affected":[],"epss":{"score":0.0026,"percentile":0.1753,"date":"2026-10-26","history":[{"date":"2026-10-14","score":0.0026,"percentile":0.16455}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.26%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-10-13T16:45:05.000Z","detail":{"from":null,"score":"4.3","severity":"MEDIUM","fromSeverity":null},"summary":"Now scored CVSS 4.3 MEDIUM."},{"kind":"new","label":"New CVE","at":"2026-10-13T13:17:25.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-10-13T13:17:24.923Z"},"summary":"New CVE, medium severity (CVSS 4.3)."}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2058800","source":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-106/","source":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-108/","source":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-109/","source":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-110/","source":"security@mozilla.org"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-109742","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."}