CVE-2026-88859

MEDIUM 6.3

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

CVSS Score

6.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-84
Vendor	red hat
Product	red hat enterprise linux 6
Published	Sep 10, 2026
Last Updated	Sep 10, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Affected Versions

Red Hat / Red Hat Enterprise Linux 6

All versions affected

Red Hat / Red Hat Enterprise Linux 7

All versions affected

Red Hat / Red Hat Enterprise Linux 8

All versions affected

Red Hat / Red Hat Enterprise Linux 9

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Red Hat would like to thank Jurre van Bergen for reporting this issue.