Advisory [CVE-2026-103582] Unbounded memory allocation and missing frame size validation in Apache NMS ActiveMQ (the.NET OpenWire client, package Apache.NMS.ActiveMQ) before 2.3.0
This security Apache Software Foundation advisory covers CVE-2026-103582; related products: Apache NMS ActiveMQ.
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Summary
Unbounded memory allocation and missing frame size validation in Apache NMS ActiveMQ (the.NET OpenWire client, package Apache.NMS.ActiveMQ) before 2.3.0.
The OpenWire unmarshalling code trusted the frame size and the length and count fields read from the network. It did not enforce a maximum frame size, and it did not check that decoded lengths fit within the frame being read.
A malicious or compromised broker, or an attacker able to intercept and modify an unencrypted connection, could send a crafted OpenWire frame with an oversized or negative length.
This could cause the client to attempt very large memory allocations, leading to excessive memory consumption, an OutOfMemoryException or an uncaught exception, and a denial of service of the client application.
Users are recommended to upgrade to version 2.3.0, which enforces a configurable maximum frame size and validates lengths against the size of the frame being read.
- Apache ActiveMQ NMS OpenWire Client Library through 2.2.0
Official advisory · medium-confidence parse· fetched 16 hours ago·verify at source
- 2.3.0
Official advisory · medium-confidence parse· fetched 16 hours ago·verify at source
Mitigation checklist
- Users are recommended to upgrade to version 2.3.0, which enforces a configurable maximum frame size and validates lengths against the size of the frame being read.
Official advisory · medium-confidence parse· fetched 16 hours ago·verify at source
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