{"schemaVersion":3,"id":"MGASA-2026-0346","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Updated thunderbird packages fix security vulnerabilities\n\nSite isolation issue in the Graphics: CanvasWebGL component.\n(CVE-2026-74934)\nPrivilege escalation in the DOM: Networking component. (CVE-2026-74935)\nUse-after-free in the JavaScript: WebAssembly component.\n(CVE-2026-74936)\nUse-after-free in the JavaScript: GC component. (CVE-2026-74937)\nMitigation bypass in the JavaScript: GC component. (CVE-2026-74938)\nPrivilege escalation in the DOM: Navigation component. (CVE-2026-74939)\nUse-after-free in the Graphics: Text component. (CVE-2026-74940)\nPrivilege escalation in the Graphics: CanvasWebGL component.\n(CVE-2026-74941)\nPrivilege escalation in the Remote Settings Client component.\n(CVE-2026-74942)\nUse-after-free in the Graphics: ImageLib component. (CVE-2026-74943)\nUse-after-free in the DOM: Core & HTML component. (CVE-2026-74944)\nInformation disclosure in the Graphics: Text component. (CVE-2026-74945)\nPrivilege escalation due to incorrect boundary conditions in the\nGraphics: CanvasWebGL component. (CVE-2026-74946)\nPrivilege escalation due to invalid pointer in the Graphics component.\n(CVE-2026-74947)\nInformation disclosure in the Graphics component. (CVE-2026-74948)\nPrivilege escalation in the Downloads API component. (CVE-2026-74950)\nPrivilege escalation in the Networking: Cookies component.\n(CVE-2026-74953)\nInformation disclosure due to side-channel in the Storage: Cache API\ncomponent. (CVE-2026-74954)\nPrivilege escalation in the Request Handling component. (CVE-2026-74955)\nSame-origin policy bypass in the DOM: Service Workers component.\n(CVE-2026-74956)\nMitigation bypass in the Safe Browsing component. (CVE-2026-74957)\nInformation disclosure in the WebRTC component. (CVE-2026-74958)\nMitigation bypass in the Storage: Cache API component. (CVE-2026-74959)\nSite isolation issue in the WebExtensions component. (CVE-2026-74960)\nSide-channel in the Web Audio component. (CVE-2026-74961)\nSite isolation issue in the Networking: Cookies component.\n(CVE-2026-74962)\nSame-origin policy bypass in the Networking: Cookies component.\n(CVE-2026-74963)\nInteger overflow in the Graphics component. (CVE-2026-74964)\nPrivilege escalation in the Shell Integration component.\n(CVE-2026-74965)\nInformation disclosure in the Form Autofill component. (CVE-2026-74966)\nSame-origin policy bypass in the Audio/Video: Playback component.\n(CVE-2026-74967)\nSite isolation issue in the Graphics: WebRender component.\n(CVE-2026-74968)\nUse-after-free in the Layout: Text and Fonts component. (CVE-2026-74969)\nSite isolation issue in the Graphics component. (CVE-2026-74970)\nInformation disclosure in the DOM: UI Events & Focus Handling component.\n(CVE-2026-74971)\nInformation disclosure in the DOM: Push Subscriptions component.\n(CVE-2026-74972)\nUse-after-free in the Graphics: Canvas2D component. (CVE-2026-74949)\nRace condition, use-after-free in the Graphics component.\n(CVE-2026-74973)\nSame-origin policy bypass in the Graphics: ImageLib component.\n(CVE-2026-74974)\nJIT miscompilation in the JavaScript Engine: JIT component.\n(CVE-2026-74976)\nInteger overflow in the Graphics component. (CVE-2026-74977)\nClickjacking issue in the Widget component. (CVE-2026-74978)\nMitigation bypass in the Add-ons Manager component. (CVE-2026-74979)\nSite isolation issue in the Audio/Video: Web Codecs component.\n(CVE-2026-74981)\nDenial-of-service in the Widget component. (CVE-2026-74982)\nMitigation bypass in the Data Loss Prevention component.\n(CVE-2026-74983)\nRace condition in the JavaScript Engine component. (CVE-2026-74984)\nPrivilege escalation in the Enterprise Policies component.\n(CVE-2026-74985)\nSite isolation issue in the CSS Parsing and Computation component.\n(CVE-2026-74986)\nInternally found bugs fixed in Thunderbird ESR 140.14,\nThunderbird ESR 153.1 and Thunderbird 154. (CVE-2026-74987)\nInternally found bugs fixed in Thunderbird ESR 153.1 and Thunderbird 154\n(CVE-2026-74988)\nInternally found bugs fixed in Thunderbird ESR 140.14,\nThunderbird ESR 153.1 and Thunderbird 154. (CVE-2026-74990)","dates":{"published":"2026-08-31T16:22:02.000Z","modified":"2026-08-31T16:41:22.606Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"mageia","product":"thunderbird","name":"thunderbird","label":"thunderbird","ecosystem":"Mageia","cpePart":null,"purl":"pkg:rpm/mageia/thunderbird","purlType":"rpm","versions":[{"text":"< 153.1.0-1.mga10","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 153.1.0-1.mga10","eol":null,"hubHref":null},{"vendor":"mageia","product":"thunderbird-l10n","name":"thunderbird-l10n","label":"thunderbird-l10n","ecosystem":"Mageia","cpePart":null,"purl":"pkg:rpm/mageia/thunderbird-l10n","purlType":"rpm","versions":[{"text":"< 153.1.0-1.mga10","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 153.1.0-1.mga10","eol":null,"hubHref":null},{"vendor":"mageia","product":"thunderbird","name":"thunderbird","label":"thunderbird","ecosystem":"Mageia","cpePart":null,"purl":"pkg:rpm/mageia/thunderbird","purlType":"rpm","versions":[{"text":"< 140.14.0-1.mga9","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 140.14.0-1.mga9","eol":null,"hubHref":null},{"vendor":"mageia","product":"thunderbird-l10n","name":"thunderbird-l10n","label":"thunderbird-l10n","ecosystem":"Mageia","cpePart":null,"purl":"pkg:rpm/mageia/thunderbird-l10n","purlType":"rpm","versions":[{"text":"< 140.14.0-1.mga9","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 140.14.0-1.mga9","eol":null,"hubHref":null}],"affectedCount":4,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://advisories.mageia.org/MGASA-2026-0346.html","label":"advisories.mageia.org/MGASA-2026-0346.html","hostname":"advisories.mageia.org","tags":["Advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=36124","label":"bugs.mageia.org/show_bug.cgi?id=36124","hostname":"bugs.mageia.org","tags":["REPORT"]},{"url":"https://www.thunderbird.net/en-US/thunderbird/140.14.0esr/releasenotes/","label":"www.thunderbird.net/en-US/thunderbird/140.14.0esr/releasenotes/","hostname":"www.thunderbird.net","tags":["WEB"]},{"url":"https://www.thunderbird.net/en-US/thunderbird/153.1.0esr/releasenotes/","label":"www.thunderbird.net/en-US/thunderbird/153.1.0esr/releasenotes/","hostname":"www.thunderbird.net","tags":["WEB"]},{"url":"https://www.mozilla.org/en-US/security/advisories/mfsa2026-79/","label":"www.mozilla.org/en-US/security/advisories/mfsa2026-79/","hostname":"www.mozilla.org","tags":["Advisory"]},{"url":"https://www.mozilla.org/en-US/security/advisories/mfsa2026-80/","label":"www.mozilla.org/en-US/security/advisories/mfsa2026-80/","hostname":"www.mozilla.org","tags":["Advisory"]}],"lineage":{"upstream":["CVE-2026-74934","CVE-2026-74935","CVE-2026-74936","CVE-2026-74937","CVE-2026-74938","CVE-2026-74939","CVE-2026-74940","CVE-2026-74941","CVE-2026-74942","CVE-2026-74943","CVE-2026-74944","CVE-2026-74945","CVE-2026-74946","CVE-2026-74947","CVE-2026-74948","CVE-2026-74949","CVE-2026-74950","CVE-2026-74953","CVE-2026-74954","CVE-2026-74955","CVE-2026-74956","CVE-2026-74957","CVE-2026-74958","CVE-2026-74959","CVE-2026-74960","CVE-2026-74961","CVE-2026-74962","CVE-2026-74963","CVE-2026-74964","CVE-2026-74965","CVE-2026-74966","CVE-2026-74967","CVE-2026-74968","CVE-2026-74969","CVE-2026-74970","CVE-2026-74971","CVE-2026-74972","CVE-2026-74973","CVE-2026-74974","CVE-2026-74976","CVE-2026-74977","CVE-2026-74978","CVE-2026-74979","CVE-2026-74981","CVE-2026-74982","CVE-2026-74983","CVE-2026-74984","CVE-2026-74985","CVE-2026-74986","CVE-2026-74987","CVE-2026-74988","CVE-2026-74990"],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-08-31T16:22:02.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-08-31T16:41:22.606Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T06:34:13.008Z","stale":false,"partial":false}}