Detections
Analytics

Fedora 43 : roundcubemail (2026-821349f438)

high Nessus Plugin ID 346806

Synopsis

The remote Fedora host is missing one or more security updates.

Description

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-821349f438 advisory.

 ## Release 1.6.19

 - Fix PHP Warning: Undefined variable $tmp_command in .../plugins/markasjunk/drivers/cmd_learn.php (#10294)
 - Security: Fix CSS declaration smuggling via un-encoded ampersand emission
 - Security: Fix CSS property injection via body `background` attribute
 - Security: Fix email header injection via bare CR in the subject field
 - Security: Fix email header injection via C-escape \r in the recipient display name
 - Security: Fix email header injection via identity's organization field
 - Security: Fix zero-click stored XSS via TNEF MIME tag injection in the attachment URL
 - Security: Fix XSS in the HTML editor using text/enriched part content
 - Security: Fix cross-user access in contact group membership (add/remove) in the SQL address book
 - Security: Fix is_local_url() bypass via trailing-dot FQDN in stylesheet URL
 - Security: Fix remote content blocking bypass via CSS escapes in FuncIRI attributes
 - Security: Fix remote-content blocker bypass via SVG SMIL src animation
 - Security: Fix SSRF bypass in Roundcube CSS proxy via hexadecimal IPv6-mapped IPv4 addresses



Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected roundcubemail package.

See Also

https://bodhi.fedoraproject.org/updates/FEDORA-2026-821349f438

Plugin Details

Severity: High

ID: 346806

File Name: fedora_2026-821349f438.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 9/17/2026

Updated: 9/17/2026

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Vulnerability Information

CPE: cpe:/o:fedoraproject:fedora:43, p-cpe:/a:fedoraproject:fedora:roundcubemail

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 9/8/2026

Vulnerability Publication Date: 9/8/2026

Reference Information