CVE-2026-35541: Roundcube Webmail type confusion in password plugin

CVE-2026-35541 · Severity: medium · CVSS 4.2 · Published 2026-04-03

Roundcube Webmail, a widely used open-source email client, contains a security flaw in its password management plugin. This vulnerability could allow an authorized user to change their account password without knowing the current one. This could be exploited in specific scenarios to bypass standard security controls intended to verify a user's identity before allowing credential changes.

Technologies: roundcube/roundcubemail (Packagist), Roundcube Webmail. Vendors: Packagist, Roundcube.

Quick answers

Is CVE-2026-35541 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-35541 being exploited in the wild.
How severe is CVE-2026-35541?
Medium severity, with a CVSS score of 4.2, published 3 April 2026.
Which products and versions are affected?
roundcube/roundcubemail (Packagist) ECOSYSTEM:introduced=1.7-beta,fixed=1.7-rc5; Roundcube Webmail < 1.5.14, 1.6.0 to < 1.6.14.
Is there a fix for CVE-2026-35541?
Yes. roundcube/roundcubemail (Packagist): upgrade to 1.7-rc5 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-35541 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-35541?
Check whether you run roundcube/roundcubemail (Packagist) or Roundcube Webmail at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • roundcube/roundcubemail (Packagist): upgrade to 1.7-rc5 or later
    composer require roundcube/roundcubemail:^1.7-rc5

Technical details

A type confusion (type juggling) vulnerability exists in the Roundcube Webmail 'password' plugin due to the use of loose comparison operators (e.g., '==') during password verification. An authenticated attacker can exploit this by providing specifically crafted input that evaluates as true against the stored password hash or current password value. This allows the attacker to bypass the requirement of knowing the 'old password' when performing a password change operation. The issue is fixed in versions 1.5.14, 1.6.14, and 1.7-rc5.

Affected products

  • Roundcube Webmail < 1.5.14, 1.6.0 to < 1.6.14

Identifiers

  • CVE-2026-35541
  • GHSA-46pv-mj2g-93gh

Timeline

  • 2026-03-18: patched: Security updates released for 1.5, 1.6, and 1.7 branches.
  • 2026-04-03: disclosed: Initial NVD publication.

References

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