Bug 2571799 (CVE-2026-108563)

Summary:	CVE-2026-108563 revive-adserver: revive-adserver: Formula execution via spreadsheet formula injection in conversion-tracking reports
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability-draft	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
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Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in revive-adserver. This flaw allows an unauthenticated remote attacker to achieve arbitrary formula execution by submitting malicious conversion values that are written unsanitized into exported conversion-tracking reports. When a user opens the exported spreadsheet report, the attacker-supplied formulas are evaluated by the spreadsheet application.	Story Points:	---
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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 2026-11-11 17:42:12 UTC

Spreadsheet formula injection in conversion-tracking report exports in Revive Adserver 6.0.8 and earlier allows an unauthenticated attacker to submit conversion values that are written as formulas instead of text in an XLS workbook. When a user opens the exported report in a spreadsheet application, attacker-supplied formulas can be evaluated. The confirmed impact is formula execution within the workbook; disclosure of information to the attacker has not been established. The issue is fixed in Revive Adserver 6.0.9 by sanitising conversion values before writing them to the affected XLS report sections.