CVE-2026-63270

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{"bugzilla": {"description": "libreoffice: LibreOffice: Information disclosure via crafted document URLs", "id": "2545890", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2545890"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-201", "details": ["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 cover every place a document can supply a URL. XForms instance data and the Calc csv and sql data providers still reached the expansion. In fixed versions these places refuse URLs with internal schemes when the URL comes from the document.", "A flaw was found in LibreOffice. This vulnerability allows information disclosure when a user opens a specially crafted document. An attacker can construct malicious URLs within document features that expand local environment variables or configuration settings, enabling the exfiltration of sensitive system information to an external server."], "mitigation": {"lang": "en:us", "value": "Refrain from opening untrusted LibreOffice documents that reference external data sources or remote URLs. Do not enable automatic external link or data updates when loading documents from unknown origins."}, "name": "CVE-2026-63270", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "libreoffice", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "libreoffice", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "libreoffice", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "libreoffice", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-10-05T11:17:24Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-63270\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-63270\nhttps://www.libreoffice.org/about-us/security/advisories/cve-2026-63270"], "statement": "A flaw was found in LibreOffice where certain document features, including XForms instance data and Calc CSV/SQL data providers, improperly process document-supplied URLs containing internal schemes. An attacker can exploit this by enticing a user to open a crafted document with constructed URLs that expand local environment variables or configuration values. When evaluated, these expanded values can be exfiltrated to a remote server under the executing user's privileges, leading to sensitive information disclosure.", "threat_severity": "Moderate"}

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