Roundcube Webmail up to 1.6.15/1.7.0 redis/memcache resource transfer

Summaryinfo

A vulnerability, which was classified as problematic, was found in Roundcube Webmail up to 1.6.15/1.7.0. This issue affects some unknown processing of the component redis/memcache. The manipulation results in resource transfer. This vulnerability is identified as CVE-2026-48847. The attack can be executed remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Roundcube Webmail up to 1.6.15/1.7.0. Affected is some unknown functionality of the component redis/memcache. The manipulation with an unknown input leads to a resource transfer vulnerability. CWE is classifying the issue as CWE-669. The product does not properly transfer a resource/behavior to another sphere, or improperly imports a resource/behavior from another sphere, in a manner that provides unintended control over that resource. This is going to have an impact on availability. CVE summarizes:

Roundcube Webmail 1.6.x before 1.6.16, and 1.7.x before 1.7.1 allows pre-authentication arbitrary file deletion via redis/memcache session poisoning bypass.

The advisory is shared for download at roundcube.net. This vulnerability is traded as CVE-2026-48847 since 05/25/2026. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 316783 (Linux Distros Unpatched Vulnerability : CVE-2026-48847), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.6.16 or 1.7.1 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (316783) and EUVD (EUVD-2026-31724). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Mail Client Software

Vendor

• Roundcube

Name

• Webmail

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.6.0
• 1.6.1
• 1.6.2
• 1.6.3
• 1.6.4
• 1.6.5
• 1.6.6
• 1.6.7
• 1.6.8
• 1.6.9
• 1.6.10
• 1.6.11
• 1.6.12
• 1.6.13
• 1.6.14
• 1.6.15
• 1.7.0

License

• free

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Once again VulDB remains the best source for vulnerability data.

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