Drupal 10.6.x < 10.6.13 / 11.3.x < 11.3.14 / 11.4.x < 11.4.4 Multiple Vulnerabilities (drupal-2026-07-15)

medium Nessus Plugin ID 327097

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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 10.6.x prior to 10.6.13, 11.3.x prior to 11.3.14, or 11.4.x prior to 11.4.4. It is, therefore, affected by multiple vulnerabilities.

- Drupal core 11.2 and above integrate the HTMX JavaScript library. Drupal core's XSS filter does not sufficiently sanitize certain HTMX attributes, which can lead to a cross-site scripting (XSS) vulnerability. The vulnerability is mitigated by the fact an attacker must be able to insert HTML with specific attributes. (CVE-2026-15917)

- The Layout Builder module doesn't sufficiently sanitize block labels in certain scenarios, which can lead to a cross-site scripting (XSS) vulnerability. This is mitigated by the fact that both the attacker and the targeted user need to be using the Layout Builder editing interface. (CVE-2026-55805)

- The Image module allows you to define and configure image fields. The module doesn't sufficiently check access to image style derivatives when those files are served via a file stream other than private://.
This vulnerability is mitigated by the fact that Drupal must be configured to use a contributed (non-core) file scheme to serve private derived images. Information disclosure issues like this one are not generally given security advisories (as described in PSA-2023-07-12)). This fix is provided as a hardening.
Contributed modules implementing custom stream wrappers may need to add similar hardenings.
(CVE-2026-15916)

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 10.6.13 / 11.3.14 / 11.4.4 or later.

Plugin Details

Severity: Medium

ID: 327097

File Name: drupal_11_4_4.nasl

Version: 1.3

Type: Remote

Family: CGI abuses

Published: 7/15/2026

Updated: 8/27/2026

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

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 2.3

Percentile: 9.77

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-2026-15917

CVSS v3

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4.7

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

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

CVSS Score Source: CVE-2026-55805

Vulnerability Information

CPE: cpe:/a:drupal:drupal

Required KB Items: installed_sw/Drupal, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 7/15/2026

Vulnerability Publication Date: 7/15/2026

Reference Information

CVE: CVE-2026-15916, CVE-2026-15917, CVE-2026-55805

IAVA: 2026-A-0734

Detections

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