Medium 6.1Published Apr 2, 2026

CVE-2026-35539An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14.

Updated under an hour ago (Oct 26, 2026, 4:50 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for Roundcube Webmail

Exploited in the last 30 days

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: 6.1 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: mitre
NVD analysis: Analyzed
Record last updated: Apr 3, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Roundcube Webmail roundcube:webmail (from the name)	before 1.5.14; from 1.6.0 before 1.6.14	CNA record
roundcube webmail roundcube:webmail	before 1.5.14; from 1.6.0 before 1.6.14	NVD

References

References

https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14	vendor-advisory
https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5	release-notes
https://github.com/roundcube/roundcubemail/commit/1b30edf5369668c92fe91dae3d52e477c808aa4f	patch
https://github.com/roundcube/roundcubemail/releases/tag/1.6.14	release-notes
https://github.com/roundcube/roundcubemail/commit/10a6d1fa8acac85c727b0a6ae4a6642bfa27bea1	patch
https://github.com/roundcube/roundcubemail/releases/tag/1.5.14	release-notes
https://github.com/roundcube/roundcubemail/commit/d742954ccbcdee7020f8f2e7c49ce0fca5a0efab	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.