{"schemaVersion":3,"id":"MGASA-2026-0378","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Updated mingw-expat & expat packages fix security vulnerabilities\n\nExpat Denial of Service via storeAtts() Quadratic Complexity.\n(CVE-2026-66046)\nExpat Out-of-Bounds Read via dtdCopy. (CVE-2026-76641)\nIn libexpat 2.8.2 and 2.8.3 before 2.8.4, misinterpretation of\ngetentropy's return code leads to insufficient entropy, which results in\nbeing vulnerable to hash flooding attacks, causing a denial of service\nvia crafted XML content. (CVE-2026-76956)\nlibexpat before 2.8.4 lacks handler call depth tracking with custom\nencoding callbacks. Thus, a use-after-free can occur. (CVE-2026-76957)","dates":{"published":"2026-09-05T04:35:57.000Z","modified":"2026-09-05T04:45:03.218Z","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":"expat","name":"expat","label":"expat","ecosystem":"Mageia","cpePart":null,"purl":"pkg:rpm/mageia/expat","purlType":"rpm","versions":[{"text":"< 2.8.4-1.mga10","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.8.4-1.mga10","eol":null,"hubHref":null},{"vendor":"mageia","product":"mingw-expat","name":"mingw-expat","label":"mingw-expat","ecosystem":"Mageia","cpePart":null,"purl":"pkg:rpm/mageia/mingw-expat","purlType":"rpm","versions":[{"text":"< 2.8.4-1.mga10","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.8.4-1.mga10","eol":null,"hubHref":null}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://advisories.mageia.org/MGASA-2026-0378.html","label":"advisories.mageia.org/MGASA-2026-0378.html","hostname":"advisories.mageia.org","tags":["Advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=36233","label":"bugs.mageia.org/show_bug.cgi?id=36233","hostname":"bugs.mageia.org","tags":["REPORT"]},{"url":"https://www.openwall.com/lists/oss-security/2026/08/31/13","label":"www.openwall.com/lists/oss-security/2026/08/31/13","hostname":"www.openwall.com","tags":["WEB"]},{"url":"https://blog.hartwork.org/posts/expat-2-8-4-released/","label":"blog.hartwork.org/posts/expat-2-8-4-released/","hostname":"blog.hartwork.org","tags":["WEB"]},{"url":"https://github.com/libexpat/libexpat/blob/R_2_8_4/expat/Changes","label":"github.com/libexpat/libexpat/blob/R_2_8_4/expat/Changes","hostname":"github.com","tags":["WEB"]},{"url":"https://nvd.nist.gov/vuln/detail/cve-2026-66046","label":"nvd.nist.gov/vuln/detail/cve-2026-66046","hostname":"nvd.nist.gov","tags":["WEB"]},{"url":"https://nvd.nist.gov/vuln/detail/cve-2026-76641","label":"nvd.nist.gov/vuln/detail/cve-2026-76641","hostname":"nvd.nist.gov","tags":["WEB"]},{"url":"https://nvd.nist.gov/vuln/detail/cve-2026-76956","label":"nvd.nist.gov/vuln/detail/cve-2026-76956","hostname":"nvd.nist.gov","tags":["WEB"]},{"url":"https://nvd.nist.gov/vuln/detail/cve-2026-76957","label":"nvd.nist.gov/vuln/detail/cve-2026-76957","hostname":"nvd.nist.gov","tags":["WEB"]}],"lineage":{"upstream":["CVE-2026-66046","CVE-2026-76641","CVE-2026-76956","CVE-2026-76957"],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-09-05T04:35:57.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-05T04:45:03.218Z","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":"2026-10-20T18:30:05.363Z","stale":false,"partial":false}}