Medium severity · published Jul 14, 2026
CVE-2026-54432
Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2 allows Stored Cross-Site Scripting (XSS)
4.7
CVSS
0.2%
EPSS
No
On KEV
Description
Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2 allows Stored Cross-Site Scripting (XSS). The issue occurs because the attachment MIME type is not properly escaped on the attachment-validation warning page.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 11% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WE
Webmail · Roundcube
1.6.0 before 1.6.17; 1.7.0 before 1.7.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-54432
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-54432
roundcube.net
https://roundcube.net/news/2026/07/05/security-updates-1.6.17-and-1.7.2
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