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

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

Required

Confidentiality

Low

Integrity

Low

Availability

Low

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.5% · higher than 45% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

RH

Red Hat Enterprise Linux 6 · Red Hat

All versions, or not specified · source: vendor

RH

Red Hat Enterprise Linux 7 · Red Hat

All versions, or not specified · source: vendor

RH

Red Hat Enterprise Linux 8 · Red Hat

All versions, or not specified · source: vendor

RH

Red Hat Enterprise Linux 9 · Red Hat

All versions, or not specified · source: vendor