{"id":"CVE-2026-63278","published":"2026-09-22T11:10:36Z","modified":"2026-09-22T12:19:43Z","title":"Package URLs can be used to exfiltrate arbitrary INI file values and environment variables","vendor":"The Document Foundation","product":"LibreOffice","tier":"tail","description":{"text":"URLs could be constructed which expanded environment variable or INI file values, so potentially sensitive information could be exfiltrated to a remote server on opening a document containing such links. The check added for CVE-2024-12426 did not recognise every way of naming the package content provider, so a URL that named it differently still reached the expansion. In fixed versions the package content provider is matched when the URL is checked.","provenance":"source","from":"CVE.org"},"cvss":{"score":6.7,"severity":"MEDIUM","version":"4.0","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.00143,"percentile":0.03553,"provenance":"source"},"cwes":[{"id":"CWE-200","name":"Exposure of Sensitive Information to an Unauthorized Actor"}],"references":[{"url":"https://www.libreoffice.org/about-us/security/advisories/cve-2026-63278","tags":[]}],"priority":{"score":5.4,"factors":[{"name":"EPSS percentile","points":0.71},{"name":"CVSS severity","points":4.69}]},"vendorSlug":"the-document-foundation","affectedVersions":[{"vendor":"The Document Foundation","product":"LibreOffice","versions":[">= 26.2, < < 26.2.5"]}],"euvd":{"id":"EUVD-2026-84357","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-the-document-foundation-libreoffice-cve-2024-12426","parents":[{"from":"CVE-2024-12426","to":"CVE-2026-63278","relation":"incomplete-fix","confidence":"high","kind":"lineage","evidence":[{"kind":"text","provenance":"source","relation":"incomplete-fix","quote":"The check added for CVE-2024-12426 did not recognise every way of naming the package content provider, so a URL that named it differently still reached the expansion.","from":"CVE.org","in":"CVE-2026-63278"},{"kind":"similar","provenance":"machine","score":0.44,"basis":"same product + CWE + description similarity"}]}]}}