Bug 2545881 (CVE-2026-63267)

Summary: CVE-2026-63267 libreoffice: libreoffice: Information disclosure via automatic external CSV link loading
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in LibreOffice. When loading a spreadsheet, external comma-separated values (CSV) data links were automatically fetched without applying standard link update controls. A remote attacker could exploit this vulnerability by enticing a user to open a specially crafted document, causing the application to read local files into the sheet or initiate outbound network requests, resulting in information disclosure.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-10-05 11:33:25 UTC
LibreOffice Calc can link a cell range to an external csv data source, and the link is saved in the document. Such a link was fetched while the document loaded, so opening a document could read a local file into the sheet, or make a request to a host of the document's choosing. In fixed versions external data links are updated under the same link update control as other links in a spreadsheet.