CVE-2026-50734 (GCVE-0-2026-50734)

Vulnerability from cvelistv5 – Published: 2026-06-30 09:53 – Updated: 2026-06-30 12:32
VLAI
Title
Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All: Pre-authentication OpenWire memory-allocation DoS during wire format negotiation
Summary
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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-30 12:32 UTC
CWE
  • CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
Impacted products
Vendor Product Version CPE status
Apache Software Foundation Apache ActiveMQ Client Affected: 0 , < 5.19.8 (semver)
Affected: 6.0.0 , < 6.2.7 (semver)
guessed Create a notification for this product.
Apache Software Foundation Apache ActiveMQ Affected: 0 , < 5.19.8 (semver)
Affected: 6.0.0 , < 6.2.7 (semver)
guessed Create a notification for this product.
Apache Software Foundation Apache ActiveMQ All Affected: 0 , < 5.19.8 (semver)
Affected: 6.0.0 , < 6.2.7 (semver)
guessed Create a notification for this product.
Credits
Andrej Tomci
Show details on NVD website
To clipboard 

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.