Debian dla-4693 : roundcube - security update

critical Nessus Plugin ID 328879

Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 11 / 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4693 advisory.

------------------------------------------------------------------------- Debian LTS Advisory DLA-4693-1 [email protected] https://www.debian.org/lts/security/ Guilhem Moulin July 22, 2026 https://wiki.debian.org/LTS
-------------------------------------------------------------------------

Package : roundcube Version : 1.4.15+dfsg.1-1+deb11u10 1.6.5+dfsg-1+deb12u10 CVE ID : CVE-2026-54432 CVE-2026-54433 CVE-2026-62641 CVE-2026-62642 CVE-2026-62643 CVE-2026-62644 Debian Bug : 1138086 1141495

Multiple vulnerabilities were discovered in Roundcube, a skinnable AJAX based webmail solution for IMAP servers, which could result in cross-site scripting, server-side request forgery, information disclosure, denial of service, or potentially account takeover.

CVE-2026-54432

Bohdan Kurinnoy discovered that attachment MIME types were neither sanitized nor escaped on the attachment-validation warning page, yielding a stored XSS vulnerability.

CVE-2026-54433

Bohdan Kurinnoy discovered that plain-text rendering was subject to a zero-click stored XSS vulnerability via crafted mailto: URIs.

CVE-2026-62641

It was discovered that the TNEF decoder was subject to Denial of Service via crafted compressed-RTF size in the winmail.dat attachment file.

CVE-2026-62642

An infinite loop was discovered in the TNEF decoder, which may lead to denial of service upon opening an email with a TNEF attachment.

CVE-2026-62643

It was discovered that the CSS sanitization fixes for CVE-2026-35540 and CVE-2026-48843 were insufficient, allowing a malicious embedded stylesheet in an HTML email to lead to SSRF or information disclosure.

CVE-2026-62644

It was discovered that the password plugin was subject to username spoofing via session data, which could potentially lead to account takeover.

For Debian 11 bullseye, these problems have been fixed in version 1.4.15+dfsg.1-1+deb11u10.

For Debian 12 bookworm, these problems have been fixed in version 1.6.5+dfsg-1+deb12u10.

We recommend that you upgrade your roundcube packages.

For the detailed security status of roundcube please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/roundcube

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS Attachment:
signature.asc Description: PGP signature

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

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

Solution

Upgrade the roundcube packages.

Plugin Details

Severity: Critical

ID: 328879

File Name: debian_DLA-4693.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 7/22/2026

Updated: 7/22/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.11

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-62644

CVSS v3

Risk Factor: Critical

Base Score: 10

Temporal Score: 8.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS Score Source: CVE-2026-62643

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, cpe:/o:debian:debian_linux:12.0, p-cpe:/a:debian:debian_linux:roundcube-core, p-cpe:/a:debian:debian_linux:roundcube-mysql, p-cpe:/a:debian:debian_linux:roundcube-pgsql, p-cpe:/a:debian:debian_linux:roundcube-plugins, p-cpe:/a:debian:debian_linux:roundcube-sqlite3, p-cpe:/a:debian:debian_linux:roundcube

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 7/22/2026

Vulnerability Publication Date: 3/31/2026

Reference Information

CVE: CVE-2026-35540, CVE-2026-48843, CVE-2026-54432, CVE-2026-54433, CVE-2026-62641, CVE-2026-62642, CVE-2026-62643, CVE-2026-62644

IAVA: 2026-A-0301-S, 2026-A-0521, 2026-A-0663

Detections

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