SSRF in Roundcube Webmail
CVE-2026-62643
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (15.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 15.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.002 · change: -0.002
Affected products
- Roundcube Webmail — versions 1.6.0, 1.7.0
Weakness classification (CWE)
References
- github.com/roundcube/roundcubemail/commit/294c7da6e7284166f040cef8607b677d459e0… (Patch)
- github.com/roundcube/roundcubemail/commit/6d69e094d55d3a9a84dfb36edf6ca985311f0… (Patch)
- github.com/roundcube/roundcubemail/releases/tag/1.6.17 (Release Notes)
- github.com/roundcube/roundcubemail/releases/tag/1.7.2 (Release Notes)
- roundcube.net/news/2026/07/05/security-updates-1.6.17-and-1.7.2 (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-62643?
- CVE-2026-62643 is a high-severity vulnerability in Roundcube Webmail, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.2/10. Published 2026-07-14.
- How severe is CVE-2026-62643?
- High severity. CVSS v3 base score is 7.2 out of 10.