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Vulnerability record · CVE-2026-62644 · published 14 July 2026

CVE-2026-62644: Roundcube webmail authentication bypass by spoofing vulnerability

Roundcube · Webmail

In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, the password plugin of the Roundcube Webmail was subject to username spoofing via session data, which could lead to account takeover.

9.8 CVSS 3.1 Critical EPSS 0.50% · top 59.6% CWE-290 · Authentication bypass by spoofing
9.8CVSS 3.1 base score
0.50%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
7References
20 Jul 2026Last modified by NVD

Description

In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, the password plugin of the Roundcube Webmail was subject to username spoofing via session data, which could lead to account takeover.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/roundcube/roundcubemail/commit/5cdc6a48b40beabff7f0bf5d9035f4491e877e4c Patch
https://github.com/roundcube/roundcubemail/commit/7414fef51cd2407d39faab99680763f10ed5231d Patch
https://github.com/roundcube/roundcubemail/commit/83150ce04d689a70f92d511bcae40adba8d55476 Patch
https://github.com/roundcube/roundcubemail/commit/9a96c20d8c7c9135876b68bebd6960af3ee60923 Patch
https://github.com/roundcube/roundcubemail/releases/tag/1.6.17 Release Notes
https://github.com/roundcube/roundcubemail/releases/tag/1.7.2 Release Notes
https://roundcube.net/news/2026/07/05/security-updates-1.6.17-and-1.7.2 Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-62644), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.