---
id: CVE-2026-88859
title: A flaw was found in Evolution
summary: >-
  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 in…
severity: medium
cvss: 6.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L'
cwe:
  - CWE-84
vendor: Red Hat
product: evolution
affected:
  - evolution
  - evolution (all versions)
  - evolution (all versions)
  - evolution (all versions)
published: '2026-09-10'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T16:18:10.867'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-88859'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-88859'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2531401'
    label: secalert@redhat.com
  - url: 'https://gitlab.gnome.org/GNOME/evolution/-/work_items/3388'
    label: secalert@redhat.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88859.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-88859'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-88859'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-10T11:37:05.635064Z'
ingestedAt: '2026-09-10T11:47:38.666Z'
epss: 0.00528
epssPercentile: 0.42201
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-09-10 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88859.json)