CVE-2026-88859

Medium

Description

A flaw was found in Evolution. A remote attacker can exploit this vulnerability by sending a specially crafted HTML email containing a spoofed vCard control. When a victim clicks on this control, Evolution's trusted JavaScript handler incorrectly assigns an attacker-controlled JavaScript URL to an iframe's source. This action leads to arbitrary JavaScript execution within the mail-viewing context, effectively bypassing the security measures designed to prevent script execution in email content.

SeverityMedium
CVSS6.3
Exploit probability—
ProductRed Hat Enterprise Linux 7
PublishedSep 10, 2026
First seenSep 10, 2026
Weakness typeCWE-84CWE-84

How to fix

Sources list no fixed version or patch link for this vulnerability.

Affected products

ProductAffected versionsFixed in
Red Hat Red Hat Enterprise Linux 7No range specified—
Red Hat Red Hat Enterprise Linux 8No range specified—
Red Hat Red Hat Enterprise Linux 9No range specified—

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