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Back to active CVEs
High · CVSS 7.5CVE-2026-50734GHSA-7259-VF48-52Q3

Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All has a Memory Allocation with Excessive Size Value vulnerabilityCVE-2026-50734

Answer in brief

CVE-2026-50734 records a High severity (CVSS 7.5) vulnerability in Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All has a Memory Allocation with Excessive Size Value vulnerability. The current sources do not mark it as known exploited. The current feed maps org.apache.activemq:activemq-all (maven), org.apache.activemq:activemq-all (maven), org.apache.activemq:activemq-client (maven), org.apache.activemq:activemq-client (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jun 30, 2026Updated Nov 4, 2026Source checked Nov 4, 2026First seen by HOL Jun 30, 2026Material review Nov 4, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.5
Exploitation
Not marked as known exploited
Affected software
6 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps org.apache.activemq:activemq-all (maven), org.apache.activemq:activemq-all (maven), org.apache.activemq:activemq-client (maven), org.apache.activemq:activemq-client (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
org.apache.activemq:activemq-allmaven<5.19.85.19.8
org.apache.activemq:activemq-allmaven>=6.0.0,<6.2.76.2.7
org.apache.activemq:activemq-clientmaven<5.19.85.19.8
org.apache.activemq:activemq-clientmaven>=6.0.0,<6.2.76.2.7
org.apache.activemq:apache-activemqmaven<5.19.85.19.8
org.apache.activemq:apache-activemqmaven>=6.0.0,<6.2.76.2.7

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for org.apache.activemq:activemq-all, org.apache.activemq:activemq-all, org.apache.activemq:activemq-client.
  2. 2Review the reported fix. Update org.apache.activemq:activemq-all to 5.19.8; org.apache.activemq:activemq-all to 6.2.7; org.apache.activemq:activemq-client to 5.19.8; org.apache.activemq:activemq-client to 6.2.7; org.apache.activemq:apache-activemq to 5.19.8; org.apache.activemq:apache-activemq to 6.2.7 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Jun 30, 2026

    Evidence: source:ghsa:source_dates:source-dates:record

  2. Source modified

    Nov 4, 2026

    Evidence: source:ghsa:source_dates:source-dates:record

  3. First seen by HOL

    Jun 30, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencelists.apache.org
  • NVD vulnerability recordnvd.nist.gov
  • Source referenceopenwall.com
Upstream source description

Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All. An unauthenticated network attacker can cause a broker DoS by sending a crafted WireFormatInfo frame with a malicious large size value. The value is not validate and causes the broker to attempt allocation during pre-auth negotiation which can trigger OOM and crash the broker. This issue affects Apache ActiveMQ Client: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ All: before 5.19.8, from 6.0.0 before 6.2.7. Users are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-789
Source
GitHub Security Advisories
Source checked
Nov 4, 2026
References
10 linked sources
Open source record