CVE-2026-88859

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

State: Published
Severity: 6.3 Medium
Published: Sep 10, 2026
Updated: Sep 10, 2026
Reserved: Sep 10, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	6.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L	redhat

Weaknesses

CWE-84 Improper Neutralization of Encoded URI Schemes in a Web Page

Affected Products

Product	Versions
Red Hat Enterprise Linux 6Red Hat
Red Hat Enterprise Linux 7Red Hat
Red Hat Enterprise Linux 8Red Hat
Red Hat Enterprise Linux 9Red Hat

References

https://access.redhat.com/security/cve/CVE-2026-88859vdb-entry
RHBZ#2531401issue-tracking
https://gitlab.gnome.org/GNOME/evolution/-/work_items/3388

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