Vulnerability · Published Jul 14, 2026 · Assigned by mitre
CVE-2026-54432
Medium 4.7
In plain English
A medium-severity cross-site scripting in Webmail from Roundcube. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.7Medium
Exploit odds (30 days)0.2%top 87.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | roundcube | 1.6.5+dfsg-1+deb12u10 | DEBIAN-CVE-2026-54432 |
| Debian:13 | roundcube | 1.6.17+dfsg-0+deb13u1 | DEBIAN-CVE-2026-54432 |
| Debian:14 | roundcube | 1.6.17+dfsg-1 | DEBIAN-CVE-2026-54432 |
| Ubuntu:25.10 | roundcube | no fix listed | UBUNTU-CVE-2026-54432 |
| Ubuntu:26.10 | roundcube | no fix listed | UBUNTU-CVE-2026-54432 |
Affected products (as reported)
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N