CVE-2019-4656

Name: CVE-2019-4656
Creator: NVD / NIST
Published: 2020-03-16T16:15:12.67+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.62%

Last modified Jun 17, 2026

CVE-2019-4656 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. IBM MQ and IBM MQ Appliance 7.1, 7.5, 8.0, 9.0 LTS, 9.1 LTS, and 9.1 CD is vulnerable to a denial of service attack that would allow an authenticated user to crash the queue and require a restart due to an error processing error messages. IBM X-Force ID: 170967.. EPSS estimates a 1.62% chance of exploitation in the next 30 days.

Description

IBM MQ and IBM MQ Appliance 7.1, 7.5, 8.0, 9.0 LTS, 9.1 LTS, and 9.1 CD is vulnerable to a denial of service attack that would allow an authenticated user to crash the queue and require a restart due to an error processing error messages. IBM X-Force ID: 170967.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.62%

73.1th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Ibm	Mq	>= 8.0.0.0, < 8.0.0.14
Ibm	Mq	>= 9.0.0.0, <= 9.0.0.9
Ibm	Mq	>= 9.1.0, < 9.1.4
Ibm	Mq	>= 9.1.0.0, < 9.1.0.4
Ibm	Mq Appliance	>= 8.0.0.0, < 8.0.0.14
Ibm	Websphere Mq	>= 7.1.0.0, <= 7.5.0.9

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/170967VDB Entry, Vendor Advisory
https://www.ibm.com/support/pages/node/1135095Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/170967VDB Entry, Vendor Advisory
https://www.ibm.com/support/pages/node/1135095Vendor Advisory

Timeline

Published: Mar 16, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-4656?

How severe is CVE-2019-4656?

CVE-2019-4656 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.62% probability of exploitation in the next 30 days.

How do I fix CVE-2019-4656?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-4656?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST