{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-0818", "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "state": "PUBLISHED", "assignerShortName": "mozilla", "dateReserved": "2026-01-09T16:32:39.712Z", "datePublished": "2026-01-28T07:39:17.467Z", "dateUpdated": "2026-01-28T07:39:17.467Z"}, "containers": {"cna": {"affected": [{"product": "Thunderbird", "vendor": "Mozilla", "versions": [{"lessThan": "147.0.1", "status": "affected", "version": "unspecified", "versionType": "custom"}]}, {"product": "Thunderbird", "vendor": "Mozilla", "versions": [{"lessThan": "140.7.1", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "CSS-based exfiltration of the content from partially encrypted emails when allowing remote content. This vulnerability affects Thunderbird < 147.0.1 and Thunderbird < 140.7.1.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "CSS-based exfiltration of the content from partially encrypted emails when allowing remote content. This vulnerability affects Thunderbird < 147.0.1 and Thunderbird < 140.7.1."}]}], "title": "CSS-based exfiltration of the content from partially encrypted emails when allowing remote content", "references": [{"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1881530"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-07/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-08/"}], "credits": [{"lang": "en", "value": "Leon Trampert, Daniel Weber, Christian Rossow, Michael Schwarz"}], "providerMetadata": {"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "shortName": "mozilla", "dateUpdated": "2026-01-28T07:39:17.467Z"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "CSS-based exfiltration of the content from partially encrypted emails when allowing remote content. This vulnerability affects Thunderbird < 147.0.1 and Thunderbird < 140.7.1."}], "id": "CVE-2026-0818", "lastModified": "2026-01-28T08:16:03.113", "metrics": {}, "published": "2026-01-28T08:16:03.113", "references": [{"source": "security@mozilla.org", "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1881530"}, {"source": "security@mozilla.org", "url": "https://www.mozilla.org/security/advisories/mfsa2026-07/"}, {"source": "security@mozilla.org", "url": "https://www.mozilla.org/security/advisories/mfsa2026-08/"}], "sourceIdentifier": "security@mozilla.org", "vulnStatus": "Received"}

{}

{}