What’s Vulnerable › Vulnerabilities

CVE-2026-88859: Evolution: evolution: javascript execution via spoofed vcard control bypasses mail script-markup restriction

• Severity: medium (CVSS 6.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-10 · updated 2026-09-10
• Weakness: CWE-84

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.

Affected products

• Red Hat Enterprise Linux 7: all versions
• Red Hat Enterprise Linux 8: all versions
• Red Hat Enterprise Linux 9: all versions

References

• https://access.redhat.com/security/cve/CVE-2026-88859
• https://bugzilla.redhat.com/show_bug.cgi?id=2531401
• https://gitlab.gnome.org/GNOME/evolution/-/work_items/3388

Get alerted when CVE-2026-88859 or the next vulnerability affects your stack