Bug 2537349

Summary:	CVE-2026-94292 epiphany: Insecure autofill visibility check allows silent exfiltration of sensitive data via CSS-hidden form fields [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Mauro Matteo Cascella <mcascell>
Component:	epiphany	Assignee:	Michael Catanzaro <mcatanza>
Status:	NEW ---	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	rawhide	CC:	gecko-bugs-nobody, gnome-sig, jhorak, mcatanza, mclasen, rstrode, tpopela
Target Milestone:	---	Keywords:	Security, SecurityTracking
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Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["bf2b4b2f-1167-4305-9fe2-fd221d5f84fe"]}
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
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Bug Blocks:	2537348

Description Mauro Matteo Cascella 2026-09-21 09:55:22 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

A flaw was found in Epiphany's form autofill feature. The EphyAutofill.isVisible() function only checks an element's on-screen size and does not detect fields hidden via CSS properties such as display:none, visibility:hidden, or opacity:0. A malicious web page can include hidden form fields that are silently populated with sensitive data (personal information, credit card numbers) when the user triggers autofill. The hidden field values can then be exfiltrated via JavaScript.

This is particularly impactful in Epiphany because credit card information is autofilled directly without requiring CVV confirmation, unlike other browsers.

Upstream issue: https://gitlab.gnome.org/GNOME/epiphany/-/work_items/2951