{"id":"CVE-2026-63274","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-63274","generatedAt":"2026-10-28T04:14:40.616Z","title":"A heap buffer overflow existed when importing a stream object.","description":"LibreOffice Draw can import PDF documents. A heap buffer overflow existed when importing a stream object. The length of the stream was taken from the object's own dictionary and was not checked against the number of bytes actually present, so copying the stream read and wrote past the end of the buffer holding it. In fixed versions the declared length is clamped to the bytes actually read.","published":"2026-09-22T12:17:13.000Z","lastModified":"2026-09-22T19:09:32.000Z","status":"Deferred","sourceIdentifier":"security@documentfoundation.org","cvss":{"version":"4.0","score":5.4,"severity":"MEDIUM","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-125","CWE-787"],"affected":[],"epss":{"score":0.00196,"percentile":0.09283,"date":"2026-10-27","history":[{"date":"2026-09-23","score":0.00167,"percentile":0.06397}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.20%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-22T12:17:13.000Z","detail":{"score":"5.4","severity":"MEDIUM","publishedAt":"2026-09-22T12:17:13.147Z"},"summary":"New CVE, medium severity (CVSS 5.4)."}],"references":[{"url":"https://www.libreoffice.org/about-us/security/advisories/cve-2026-63274","source":"security@documentfoundation.org"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-63274","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}