by Kastro
Paper/Archive/CVE-2026-62643

CVE-2026-62643

Roundcube Webmail — 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…

EPSS 0.2%CVSS 10.0
critical.is priorityof 100
33
CVSS 10.0 (NVD)10.0 / 10 × 3030.0Not in CISA KEV+300.0EPSS percentile 15.9.159 × 203.2No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Webmail1.6.0 – < 1.6.171.6.17CNA
Webmail1.7.0 – < 1.7.21.7.2CNA

Scores by source

NVD10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
mitre (CNA)7.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: partial

References

refroundcube.net/news/2026/07/05/security-updates-1.6.17-and-1.7.2refgithub.com/roundcube/roundcubemail/releases/tag/1.7.2refgithub.com/roundcube/roundcubemail/commit/6d69e094d55d3a9a84dfb36edf6ca985311f0c1crefgithub.com/roundcube/roundcubemail/releases/tag/1.6.17refgithub.com/roundcube/roundcubemail/commit/294c7da6e7284166f040cef8607b677d459e0786