---
id: CVE-2026-75002
title: >-
  In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, mail search and
  LITERAL+ byte-count desynchronization could lead to information disclosure or
  privilege escalation via IMAP command injection.
summary: >-
  In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, mail search and
  LITERAL+ byte-count desynchronization could lead to information disclosure or
  privilege escalation via IMAP command injection.
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L'
cwe:
  - CWE-77
vendor: roundcube
product: webmail
affected:
  - 'webmail >= 1.6.0, < 1.6.18'
  - 'webmail >= 1.7.0, < 1.7.3'
patched:
  - webmail 1.7.3
published: '2026-08-17'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T18:59:00.907'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-75002'
references:
  - url: >-
      https://github.com/roundcube/roundcubemail/commit/404d43f1b0125319c3cf8c9e3df39074c0cb80ad
    label: cve@mitre.org
  - url: >-
      https://github.com/roundcube/roundcubemail/commit/73233abe581b3b31cefd00041c7086c40e1793ea
    label: cve@mitre.org
  - url: 'https://github.com/roundcube/roundcubemail/releases/tag/1.6.18'
    label: cve@mitre.org
  - url: 'https://github.com/roundcube/roundcubemail/releases/tag/1.7.3'
    label: cve@mitre.org
  - url: 'https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3'
    label: cve@mitre.org
tags:
  - nvd
epss: 0.01356
epssPercentile: 0.7044
ingestedAt: '2026-09-08T19:08:49.590Z'
---

## Overview

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, mail search and LITERAL+ byte-count desynchronization could lead to information disclosure or privilege escalation via IMAP command injection.

## Affected

- `webmail >= 1.6.0, < 1.6.18`
- `webmail >= 1.7.0, < 1.7.3`

## Remediation

Upgrade past the affected range:

- `webmail 1.7.3`