---
id: CVE-2026-59994
title: EspoCRM is an open source customer relationship management application
summary: >-
  EspoCRM is an open source customer relationship management application. Prior
  to 9.3.9, an unauthenticated remote attacker can send an email to a monitored
  group or IMAP address, including an email-to-Case address, and place arbitrary
  HT…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N'
cwe:
  - CWE-79
vendor: espocrm
product: espocrm
affected:
  - espocrm < 9.3.9
published: '2026-10-15'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T15:17:36.297'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-59994'
references:
  - url: >-
      https://github.com/espocrm/espocrm/commit/f9fd47622df04617728643b4b8f1a22563cbc6e7
    label: security-advisories@github.com
  - url: 'https://github.com/espocrm/espocrm/releases/tag/9.3.9'
    label: security-advisories@github.com
  - url: 'https://github.com/espocrm/espocrm/security/advisories/GHSA-3rh4-9hcq-g79m'
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-15T15:09:08.428Z'
---

## Overview

EspoCRM is an open source customer relationship management application. Prior to 9.3.9, an unauthenticated remote attacker can send an email to a monitored group or IMAP address, including an email-to-Case address, and place arbitrary HTML in its plain-text body. EspoCRM stores that body and renders it without escaping in Email Received stream notification emails sent to users following the related record, allowing HTML injection and, in mail clients that execute it, JavaScript execution. Earlier sanitization for Post and Mention notifications did not cover this notification path. This issue is fixed in version 9.3.9.

## Remediation

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