CVE-2026-35541 Roundcube Webmail: Incorrect password comparison in the password plugin

Medium 4.2 Published 3 Apr 2026 Updated 3 Apr 2026

Attackers can change user passwords without knowing the old password due to type confusion in the password plugin, leading to account takeover.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2026-35541?

CVE-2026-35541 is a medium-severity authentication bypass vulnerability in Roundcube Webmail, published on 3 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Incorrect password comparison in the password plugin could lead to type confusion that allows a password change without knowing the old password.

Weakness: CWE-843

Which versions are affected by CVE-2026-35541?

2 open source packages ship an affected version, including roundcube/roundcubemail. It affects 1 product.

Package	Affected	Fixed in
`roundcube/roundcubemail` Packagist	From `1.7-beta`	`1.7-rc5`
`roundcube/roundcubemail` Packagist	From `1.7-beta`	`1.7-rc5`

Products include Roundcube Webmail.

How do I fix CVE-2026-35541?

Upgrade roundcube/roundcubemail to 1.7-rc5 or later.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-35541 being exploited?

There is no known exploitation of CVE-2026-35541 in the wild and no public exploit code.

All Roundcube Webmail vulnerabilities

Sources

Also known as DEBIAN-CVE-2026-35541, GHSA-46pv-mj2g-93gh, UBUNTU-CVE-2026-35541.