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CVE Vulnerability Details :

CVE-2026-35539

PUBLISHED

More Info Official Page

Assigner-mitre

Assigner Org ID-8254265b-2729-46b6-b9e3-3dfca2d5bfca

Published At-03 Apr, 2026 | 03:39

Updated At-03 Apr, 2026 | 13:10

▼CVE Numbering Authority (CNA)

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.

Affected Products

Vendor

Roundcube Webmail Project

Product

Webmail

Default Status

unaffected

Versions

Affected

From 0 before 1.5.14 (semver)
From 1.6.0 before 1.6.14 (semver)

Problem Types

Type	CWE ID	Description
CWE	CWE-79	CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')

Type: CWE

CWE ID: CWE-79

Description: CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')

Metrics

Version	Base score	Base severity	Vector
3.1	6.1	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Version: 3.1

Base score: 6.1

Base severity: MEDIUM

Vector:

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

Hyperlink	Resource
https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14	N/A
https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5	N/A
https://github.com/roundcube/roundcubemail/commit/1b30edf5369668c92fe91dae3d52e477c808aa4f	N/A
https://github.com/roundcube/roundcubemail/releases/tag/1.6.14	N/A
https://github.com/roundcube/roundcubemail/commit/10a6d1fa8acac85c727b0a6ae4a6642bfa27bea1	N/A
https://github.com/roundcube/roundcubemail/releases/tag/1.5.14	N/A
https://github.com/roundcube/roundcubemail/commit/d742954ccbcdee7020f8f2e7c49ce0fca5a0efab	N/A