CVE-2026-75006In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to SSRF or Information Disclosure, e.g., if styleshe…
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In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, 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. This issue exists because of insufficient fixes for CVE-2026-35540, CVE-2026-48843 and CVE-2026-62643.
- CVSS
- 5.8 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
- Weakness (CWE)
- CWE-918
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- mitre
- NVD analysis
- Analyzed
- Record last updated
- Aug 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Roundcube Webmail roundcube:webmail (from the name) | from 1.6.0 before 1.6.18; from 1.7.0 before 1.7.3 | CNA record |
roundcube webmail roundcube:webmail | from 1.6.0 before 1.6.18; from 1.7.0 before 1.7.3 | NVD |
References
- https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3vendor-advisory
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.18release-notes
- https://github.com/roundcube/roundcubemail/commit/8a92380b06b5df1481e034c4f40d6a6546c21223patch
- https://github.com/roundcube/roundcubemail/commit/92f85c883594e5be757154f94548a9ba903455c9patch
- https://github.com/roundcube/roundcubemail/releases/tag/1.7.3release-notes
- https://github.com/roundcube/roundcubemail/commit/7e10ca0110b7c9aa1b7850b843bb6625e47bbe00patch
- https://github.com/roundcube/roundcubemail/commit/c111b72950cd2bf57d6b86cd129568d90403322dpatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.