Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-42253

Severity CVSS v4.0:
Pending analysis
Type:
CWE-79 Cross-Site Scripting (XSS)
Publication date:
01/06/2026
Last modified:
01/06/2026

Description

Improper Neutralization of Input During Web Page Generation (&amp;#39;Cross-site Scripting&amp;#39;) vulnerability in Apache ActiveMQ, Apache ActiveMQ Web.<br /> <br /> The MessageServlet in the ActiveMQ web console API copies every JMS message<br /> property into an HTTP response header without any validation. This can allow overwriting and injecting security headers by setting them on JMS messages that are returned by the servlet.<br /> <br /> This issue affects Apache ActiveMQ: before 5.19.7, from 6.0.0 before 6.2.6; Apache ActiveMQ Web: before 5.19.7, from 6.0.0 before 6.2.6.<br /> <br /> Users are recommended to upgrade to version 5.19.7 or 6.2.6, which fixes the issue. The MessageServlet has now been deprecated and disabled by default.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS v3.1 Severity and Metrics:

Base Score: 6.10 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope (S): Changed
Confidentiality (C): Low
Integrity (I): Low
Availability (A): None

Base Score 3.x
6.10
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:* 5.19.7 (excluding)
cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:* 6.0.0 (including) 6.2.6 (excluding)
cpe:2.3:a:apache:activemq_web:*:*:*:*:*:*:*:* 5.19.7 (excluding)
cpe:2.3:a:apache:activemq_web:*:*:*:*:*:*:*:* 6.0.0 (including) 6.2.6 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools