CVE-2026-48843
published 2026-05-25CVE-2026-48843: Roundcube Webmail 1.6.x between 1.6.14 and 1.6.16,and 1.7.x before 1.7.1 has Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may…
PriorityP339high7.2CVSS 3.1
AVNACLPRNUINSCCLILAN
EPSS
0.30%
21.7th percentile
Roundcube Webmail 1.6.x between 1.6.14 and 1.6.16,and 1.7.x before 1.7.1 has Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to SSRF or Information Disclosure, e.g., if stylesheet links point to local network hosts. The issue stems from an insufficient fix for CVE-2026-35540.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| roundcube | webmail | >= 1.6.14 < 1.6.16 | 1.6.16 |
| roundcube | webmail | >= 1.7.0 < 1.7.1 | 1.7.1 |
CVSS provenance
nvdv3.17.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
cvelistv5v3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
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GHSA
GHSA-2hww-8583-w9wf: Roundcube Webmail 1
ghsa_unreviewed·2026-05-26·CVSS 6.5
CVE-2026-48843 [MEDIUM] CWE-918 GHSA-2hww-8583-w9wf: Roundcube Webmail 1
Roundcube Webmail 1.6.x between 1.6.14 and 1.6.16,and 1.7.x before 1.7.1 has Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to SSRF or Information Disclosure, e.g., if stylesheet links point to local network hosts. The issue stems from an insufficient fix for CVE-2026-35540.
CVEList
CVE-2026-48843: Roundcube Webmail 1
cvelistv5·2026-05-25·CVSS 6.5
CVE-2026-48843 [MEDIUM] CWE-918 CVE-2026-48843: Roundcube Webmail 1
Roundcube Webmail 1.6.x between 1.6.14 and 1.6.16,and 1.7.x before 1.7.1 has Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to SSRF or Information Disclosure, e.g., if stylesheet links point to local network hosts. The issue stems from an insufficient fix for CVE-2026-35540.
VulDB
Roundcube Webmail up to 1.6.15/1.7.0 Mail Message server-side request forgery (EUVD-2026-31718)
vuldb·2026-05-25
CVE-2026-48843 [CRITICAL] Roundcube Webmail up to 1.6.15/1.7.0 Mail Message server-side request forgery (EUVD-2026-31718)
A vulnerability classified as critical was found in Roundcube Webmail up to 1.6.15/1.7.0. This affects an unknown part of the component Mail Message Handler. Executing a manipulation can lead to server-side request forgery.
The identification of this vulnerability is CVE-2026-48843. The attack may be launched remotely. There is no exploit available.
Upgrading the affected component is advised.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-48843 roundcubemail: information disclosure and Server-Side Request Forgery via insufficient CSS sanitization [epel-all]
bugzilla·2026-05-26·CVSS 7.2
CVE-2026-48843 [HIGH] CVE-2026-48843 roundcubemail: information disclosure and Server-Side Request Forgery via insufficient CSS sanitization [epel-all]
CVE-2026-48843 roundcubemail: information disclosure and Server-Side Request Forgery via insufficient CSS sanitization [epel-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Bugzilla
CVE-2026-48843 roundcubemail: information disclosure and Server-Side Request Forgery via insufficient CSS sanitization [fedora-all]
bugzilla·2026-05-26·CVSS 7.2
CVE-2026-48843 [HIGH] CVE-2026-48843 roundcubemail: information disclosure and Server-Side Request Forgery via insufficient CSS sanitization [fedora-all]
CVE-2026-48843 roundcubemail: information disclosure and Server-Side Request Forgery via insufficient CSS sanitization [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Bugzilla
CVE-2026-48843 roundcubemail: information disclosure and Server-Side Request Forgery via insufficient CSS sanitization
bugzilla·2026-05-25·CVSS 6.5
CVE-2026-48843 [MEDIUM] CVE-2026-48843 roundcubemail: information disclosure and Server-Side Request Forgery via insufficient CSS sanitization
CVE-2026-48843 roundcubemail: information disclosure and Server-Side Request Forgery via insufficient CSS sanitization
Roundcube Webmail 1.6.x between 1.6.14 and 1.6.16,and 1.7.x before 1.7.1 has Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to SSRF or Information Disclosure, e.g., if stylesheet links point to local network hosts. The issue stems from an insufficient fix for CVE-2026-35540.
https://github.com/roundcube/roundcubemail/commit/ab96c88bfd888866ec5e02190b19618db283923ahttps://github.com/roundcube/roundcubemail/commit/cb3fc9041e91640ba9ba49ee7b2147c176ebf5a1https://github.com/roundcube/roundcubemail/releases/tag/1.6.16https://github.com/roundcube/roundcubemail/releases/tag/1.7.1https://roundcube.net/news/2026/05/24/security-updates-1.6.16-and-1.7.1
2026-05-25
Published