CVE-2026-62643

In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, 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. NOTE: this issue exists because of insufficient fixes for CVE-2026-35540 and CVE-2026-48843.

CVSS 3.1

10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

EPSS

0.2% chance of exploitation in the next 30 days; higher than 15% of CVEs (scores of 2026-10-25)

CWE

CWE-918

Published

2026-07-14

Modified

2026-10-24

Record from

the NVD, synced 2026-10-25

Affected

• roundcube:webmail

References

• https://github.com/roundcube/roundcubemail/commit/294c7da6e7284166f040cef8607b677d459e0786
• https://github.com/roundcube/roundcubemail/commit/6d69e094d55d3a9a84dfb36edf6ca985311f0c1c
• https://github.com/roundcube/roundcubemail/releases/tag/1.6.17
• https://github.com/roundcube/roundcubemail/releases/tag/1.7.2
• https://roundcube.net/news/2026/07/05/security-updates-1.6.17-and-1.7.2

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