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.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

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

No history.

Information

Published : 2026-04-03 05:16

Updated : 2026-07-24 21:10

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')

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