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CVE-2026-42253

32
FAUCET Score

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Apache ActiveMQ, Apache ActiveMQ Web. The MessageServlet in the ActiveMQ web console API copies every JMS message 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. 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. 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.

First published: Jun 1, 2026Last modified: Jun 1, 2026

Impacted Technologies

VendorProductVersion(s)CPE
< 5.19.7CPE matchmatch criteria
cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:*
>= 6.0.0, < 6.2.6CPE matchmatch criteria
cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:*
< 5.19.7CPE matchmatch criteria
cpe:2.3:a:apache:activemq_web:*:*:*:*:*:*:*:*
>= 6.0.0, < 6.2.6CPE matchmatch criteria
cpe:2.3:a:apache:activemq_web:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.11%
Probability of exploitation in next 30 days
EPSS Percentile
62.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0111 is in the 75th percentile among its peer group of 26,221 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

mavenpatch availablevia ghsa
Product: org.apache.activemq:apache-activemqFixed in: 5.19.7
mavenpatch availablevia ghsa
Product: org.apache.activemq:apache-activemqFixed in: 6.2.6
mavenpatch availablevia ghsa
Product: org.apache.activemq:activemq-webFixed in: 5.19.7
mavenpatch availablevia ghsa
Product: org.apache.activemq:activemq-webFixed in: 6.2.6
apachevendor investigatingvia vendor_rss
View patch

Vendor Advisories (2)

mavenGHSA-8wm6-6fqh-phmcmedium

Apache ActiveMQ, Apache ActiveMQ Web have a Cross-site Scripting issue

Jun 1, 2026
apacheapache:www.mail-archive.com/[email protected]/msg11182.html

CVE-2026-42253: Apache ActiveMQ, Apache ActiveMQ Web: HTTP Response Header Injection via JMS Message Properties

May 31, 2026

References

openwall.com / lists/oss-security/2026/05/31/17
Mailing ListThird Party Advisory
lists.apache.org / thread/j9vmlc410ht5f28fc98gx75jcbq62j00
Mailing ListVendor Advisory