What’s Vulnerable › Vulnerabilities

CVE-2026-62644

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-14 · updated 2026-10-24
• Weakness: CWE-290

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.

Affected products

• Roundcube Webmail: from 1.6.0 before 1.6.17; from 1.7.0 before 1.7.2 — fixed in 1.6.17, 1.7.2

How to fix

Upgrade to a fixed version: Roundcube Webmail 1.6.17, 1.7.2. Check the vendor advisory for mitigations.

References

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

Get alerted when CVE-2026-62644 or the next vulnerability affects your stack