{"affected":[{"product":"Thunderbird","source":"CNA: mozilla","vendor":"Mozilla","versions":[{"lessThanOrEqual":"153.*","status":"unaffected","version":"153.6","versionType":"rpm"},{"lessThanOrEqual":"*","status":"unaffected","version":"159","versionType":"rpm"}]}],"cveId":"CVE-2026-118175","cwes":["CWE-200"],"description":"When replying to, forwarding, or editing a crafted email message as new, Thunderbird could embed parts of a different message stored in the same folder into the message being composed, without showing a blocked content warning. If the user sent the message, the content of the other message was disclosed to the recipients. This vulnerability was fixed in Thunderbird 159 and Thunderbird 153.6.","epss":{"date":"2026-11-04","percentile":0.07577,"score":0.00179},"exploits":[],"kev":null,"metrics":[{"score":7.5,"severity":"high","source":"ADP: CISA-ADP","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},{"score":7.5,"severity":"high","source":"NVD: 134c704f-9b21-4f2e-91b3-4a467353bcc0","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}],"modifiedAt":1793812653623,"publishedAt":1793124989537,"references":[{"source":"CNA: mozilla","tags":[],"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2081720"},{"source":"CNA: mozilla","tags":[],"url":"https://www.mozilla.org/security/advisories/mfsa2026-121/"},{"source":"CNA: mozilla","tags":[],"url":"https://www.mozilla.org/security/advisories/mfsa2026-122/"},{"source":"security@mozilla.org","tags":[],"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2081720"},{"source":"security@mozilla.org","tags":[],"url":"https://www.mozilla.org/security/advisories/mfsa2026-121/"},{"source":"security@mozilla.org","tags":[],"url":"https://www.mozilla.org/security/advisories/mfsa2026-122/"}],"remediation":[],"revision":"586a979a8390cbfda982d42f13264cef167d5a9c04c2562093e84199588923dd","sources":[{"modifiedAt":1793810974281,"name":"CNA: mozilla","retrievedAt":1793812176871,"url":"https://www.cve.org/CVERecord?id=CVE-2026-118175"},{"modifiedAt":1793812653623,"name":"NVD","retrievedAt":1793816559838,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118175"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793812191312,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-118175"}],"ssvc":{"assessedAt":1793810949936,"automatable":"yes","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Content of other messages could be included when replying to a crafted message","updatedAt":1793816559838}