CVE-2026-75006

5.8 MEDIUM 0.4% exploit odds Fix listed Disclosure

What it is

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.

At a glance

Exploitability: Can be exploited over the network without logging in. Limited direct impact.
Exploit odds: 0.4% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2026-08-17 13:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-09-08 18:43 UTC Last updatedMost recent change to the record

Details

Published: 2026-08-17 13:16 UTC
Last modified: 2026-09-08 18:43 UTC
Exploit probability: 0.4% · EPSS, next 30 days
Weakness: CWE-918 · Server-side request forgery
Record status: Analyzed

Affected

Roundcube Webmail < 1.6.18
Roundcube Webmail < 1.7.3

Attack profile CVSS 3.1 · 5.8

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Changed
Confidentiality: None
Integrity: Low
Availability: None

Raw vector

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

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Fix and advisories

References

NVD record · CVE.org record