CVE-2026-88859

MEDIUM
MEDIUM Priority: 0.03 BB Relevance: 63/100
Published: 2026-09-10 Modified: 2026-11-06 First seen: 2026-11-06 Status: active

Attack Surface

Network Low Complexity No Auth

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: Required
S: Unchanged
C: Low
I: Low
A: Low

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.

Bug Bounty Relevance

63 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity

CVSS Score

6.3 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

EPSS — Exploitation Probability

0.40%
Raw Score 0.003980
Percentile 34.6%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00398
2026-11-12
0.00528
2026-11-10
0.00528
2026-11-09
0.00528
2026-11-08
0.00528
2026-11-07
0.00528
2026-11-06
0.00528
2026-11-05
0.00528

Intelligence Sources

mitre ref →
nvd ref →