What is CVE-2026-62644?

CVE-2026-62644 is a medium-severity vulnerability in Roundcube Webmail, classified under Authentication Bypass by Spoofing. CVSS score: 6.4/10. Published 2026-07-14.

How severe is CVE-2026-62644?

Medium severity. CVSS v3 base score is 6.4 out of 10.

Vulnerability in Roundcube Webmail

CVE-2026-62644

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 v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N.

Affected products

Roundcube Webmail — versions 1.6.0, 1.7.0

Weakness classification (CWE)

CWE-290 — Authentication Bypass by Spoofing

References

cve@mitre.org
cve@mitre.org
cve@mitre.org
cve@mitre.org
cve@mitre.org
cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2026-62644?: CVE-2026-62644 is a medium-severity vulnerability in Roundcube Webmail, classified under Authentication Bypass by Spoofing. CVSS score: 6.4/10. Published 2026-07-14.
How severe is CVE-2026-62644?: Medium severity. CVSS v3 base score is 6.4 out of 10.