6.1

CVE-2026-42253: apache software foundation apache activemq Cross-site Scripting

CVSS: 6.1v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-42253DEBIAN-CVE-2026-42253CGA-46p6-p8xf-r36m
Published 01-06-2026Last modified 03-06-2026
Open JSON

Vulnerability summary

CVE-2026-42253 is a medium (CVSS 6.1) Cross-site Scripting vulnerability in apache software foundation apache activemq. EPSS estimates a 0.68% chance of exploitation in the next 30 days, higher than 51.4% of scored vulnerabilities.

Overall risk
25/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.1/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.68%
0%100%
Low · -0.43 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 01-06-2026
    PublishedVulnerability first disclosed.
  2. 03-06-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.68%

Chance of exploitation in the next 30 days

Percentile

51%

Versus all other CVEs

30-day change

-0.43 pp

From 1.11% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.68%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Apache2 products
Apache software foundation2 products
Chainguard2 products
  • apache-activemq-6.1All versions (No fix recorded)
  • apache-activemq-fips-6.1All versions (No fix recorded)
Org.apache.activemq2 products
  • activemq-web< 5.19.7 | ≥ 6.0.0, < 6.2.6
  • apache-activemq< 5.19.7 | ≥ 6.0.0, < 6.2.6
Debian1 product
  • activemqAll versions (No fix recorded)
Ubuntu1 product
  • activemqAll versions (No fix recorded)

6 vendors · 10 products

References

10 links