CVE-2026-35539

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-35539
An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. XSS exists because of insufficient HTML attachment sanitization in preview mode. A victim must preview a text/html attachment.

6.1 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References
Link Resource
https://github.com/roundcube/roundcubemail/commit/10a6d1fa8acac85c727b0a6ae4a6642bfa27bea1 Patch
https://github.com/roundcube/roundcubemail/commit/1b30edf5369668c92fe91dae3d52e477c808aa4f Patch
https://github.com/roundcube/roundcubemail/commit/d742954ccbcdee7020f8f2e7c49ce0fca5a0efab Patch
https://github.com/roundcube/roundcubemail/releases/tag/1.5.14 Release Notes
https://github.com/roundcube/roundcubemail/releases/tag/1.6.14 Release Notes
https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5 Release Notes
https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14 Vendor Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
History

07 Apr 2026, 20:53

Type Values Removed Values Added
First Time Roundcube
Roundcube webmail
CPE cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
References () https://github.com/roundcube/roundcubemail/commit/10a6d1fa8acac85c727b0a6ae4a6642bfa27bea1 - () https://github.com/roundcube/roundcubemail/commit/10a6d1fa8acac85c727b0a6ae4a6642bfa27bea1 - Patch
References () https://github.com/roundcube/roundcubemail/commit/1b30edf5369668c92fe91dae3d52e477c808aa4f - () https://github.com/roundcube/roundcubemail/commit/1b30edf5369668c92fe91dae3d52e477c808aa4f - Patch
References () https://github.com/roundcube/roundcubemail/commit/d742954ccbcdee7020f8f2e7c49ce0fca5a0efab - () https://github.com/roundcube/roundcubemail/commit/d742954ccbcdee7020f8f2e7c49ce0fca5a0efab - Patch
References () https://github.com/roundcube/roundcubemail/releases/tag/1.5.14 - () https://github.com/roundcube/roundcubemail/releases/tag/1.5.14 - Release Notes
References () https://github.com/roundcube/roundcubemail/releases/tag/1.6.14 - () https://github.com/roundcube/roundcubemail/releases/tag/1.6.14 - Release Notes
References () https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5 - () https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5 - Release Notes
References () https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14 - () https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14 - Vendor Advisory

03 Apr 2026, 05:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-04-03 05:16

Updated : 2026-04-07 20:53

NVD link : CVE-2026-35539

Mitre link : CVE-2026-35539

CVE.ORG link : CVE-2026-35539

JSON object : View

Products Affected

roundcube

  • webmail
CWE
CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')