Drupal 10.5.x < 10.5.9 / 10.6.x < 10.6.7 / 11.2.x < 11.2.11 / 11.3.x < 11.3.7 Multiple Vulnerabilities (drupal-2026-04-15)

medium Nessus Plugin ID 306602

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Synopsis

A PHP application running on the remote web server is affected by multiple vulnerabilities.

Description

According to its self-reported version, the instance of Drupal running on the remote web server is 10.5.x prior to 10.5.9, 10.6.x prior to 10.6.7, 11.2.x prior to 11.2.11, or 11.3.x prior to 11.3.7. It is, therefore, affected by multiple vulnerabilities.

- Drupal core's jQuery integration for AJAX modal dialog boxes does not sufficiently sanitize certain options, which which can lead to a cross-site scripting (XSS) vulnerability. (CVE-2026-6365)

- Drupal 11.3 comes with support for completing entity suggestions whilst adding a link to CKEditor 5. The suggestions aren't sufficiently sanitized and a malicious user could trigger a stored cross site scripting attack against another user. (CVE-2026-6367)

- Drupal core contains a chain of methods that could be exploitable when an insecure deserialization vulnerability exists on the site. This so-called gadget chain presents no direct threat, but is a vector that can be used to achieve remote code execution or SQL injection if the application deserializes untrusted data due to another vulnerability. This issue is not directly exploitable. This issue is mitigated by the fact that in order for it to be exploitable, a separate vulnerability must be present to allow an attacker to pass unsafe input to unserialize(). There are no such known exploits in Drupal core.
(CVE-2026-6366)

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

Solution

Upgrade to Drupal version 10.5.9 / 10.6.7 / 11.2.11 / 11.3.7 or later.

Plugin Details

Severity: Medium

ID: 306602

File Name: drupal_11_3_7.nasl

Version: 1.2

Type: Remote

Family: CGI abuses

Published: 4/16/2026

Updated: 4/20/2026

Configuration: Enable paranoid mode, Enable thorough checks (optional)

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

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

CVSS Score Source: CVE-2026-6365

CVSS v3

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.3

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

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

Vulnerability Information

CPE: cpe:/a:drupal:drupal

Required KB Items: Settings/ParanoidReport, installed_sw/Drupal

Exploit Ease: No known exploits are available

Patch Publication Date: 4/15/2026

Vulnerability Publication Date: 4/15/2026

Reference Information

CVE: CVE-2026-6365, CVE-2026-6366, CVE-2026-6367

IAVA: 2026-A-0361

Detections

Analytics