{"id":"CVE-2026-109742","published":"2026-10-13T12:29:26Z","modified":"2026-10-13T18:17:05Z","title":"Information disclosure in the PDF Viewer component","vendor":"Mozilla","product":"Firefox","tier":"tail","description":{"text":"Information disclosure in the PDF Viewer component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.","provenance":"source","from":"CVE.org"},"cvss":{"score":4.3,"severity":"MEDIUM","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","provenance":"source","from":"CISA ADP Vulnrichment"},"epss":{"score":0.0026,"percentile":0.17665,"provenance":"source"},"cwes":[{"id":"CWE-200","name":"Exposure of Sensitive Information to an Unauthorized Actor"}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2058800","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-106/","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-108/","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-109/","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-110/","tags":[]}],"priority":{"score":6.5,"factors":[{"name":"EPSS percentile","points":3.53},{"name":"CVSS severity","points":3.01}]},"vendorSlug":"mozilla","euvd":{"id":"EUVD-2026-98504","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-class-mozilla-firefox-cwe-200"}}