Roundcube Webmail: Insufficient CSS sanitization in HTML e-mail messages
An issue was discovered in Roundcube Webmail 1.6.0 before 1.6.14. 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.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-35540US | medium6.5 | — | ||
An issue was discovered in Roundcube Webmail 1.6.0 before 1.6.14. Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to SSRF or Information Dis… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/roundcube/roundcubemailPACKAGE
- https://github.com/roundcube/roundcubemail/commit/27ec6cc9cb25e1ef8b4d4ef39ce76d619caa6870WEB
- https://github.com/roundcube/roundcubemail/commit/579b68eff90650a5c782e153debd66c765648942WEB
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.14WEB
- https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-35540ADVISORY
- https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14WEB
scry
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