CVE-2026-35540 | THREATINT

Description

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.

PUBLISHED Reserved 2026-04-03 | Published 2026-04-03 | Updated 2026-04-03 | Assigner mitre

MEDIUM: 5.4CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

Problem types

CWE-669 Incorrect Resource Transfer Between Spheres

Product status

Default status

unaffected

1.6.0 (semver) before 1.6.14

affected

References

roundcube.net/...3/18/security-updates-1.7-rc5-1.6.14-1.5.14

github.com/roundcube/roundcubemail/releases/tag/1.7-rc5

github.com/...ommit/579b68eff90650a5c782e153debd66c765648942

github.com/roundcube/roundcubemail/releases/tag/1.6.14

github.com/...ommit/27ec6cc9cb25e1ef8b4d4ef39ce76d619caa6870

cve.org (CVE-2026-35540)

nvd.nist.gov (CVE-2026-35540)

Download JSON