CVE-2026-88859

6.3 mediumEPSS 0.5%

Medium (6.3). EPSS 0.5% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

6.3 medium

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

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 44% of CVEs (scores of 2026-10-31)
CWE: CWE-84
Published: 2026-09-10
Modified: 2026-09-10
Record from: the NVD, synced 2026-10-19

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

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