Vulnerability in Roundcube Webmail
CVE-2026-75010
In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the modoboa driver of the password plugin could leak a Modoboa API authentication token to a user-controlled host via crafted session data. This issue only affects Roundcube instances using the password plugin with its modoboa driver.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (30.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 30.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Roundcube Webmail — versions 1.6.0, 1.7.0
Weakness classification (CWE)
References
- github.com/roundcube/roundcubemail/commit/65b8ea9d8304b10f1d3bda5bcc82f9c682cf8… (Patch)
- github.com/roundcube/roundcubemail/commit/b0e26d617e7bbe3051135285993bc55f718fe… (Patch)
- github.com/roundcube/roundcubemail/releases/tag/1.6.18 (Release Notes)
- github.com/roundcube/roundcubemail/releases/tag/1.7.3 (Release Notes)
- roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3 (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-75010?
- CVE-2026-75010 is a medium-severity vulnerability in Roundcube Webmail, classified under Incorrect Resource Transfer Between Spheres. CVSS score: 6.4/10. Published 2026-08-17.
- How severe is CVE-2026-75010?
- Medium severity. CVSS v3 base score is 6.4 out of 10.