What is CVE-2023-26285?

CVE-2023-26285 is a medium-severity vulnerability in IBM Mq, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.9/10. Published 2023-05-05.

How severe is CVE-2023-26285?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Buffer overflow in IBM Mq

CVE-2023-26285

IBM MQ 9.2 CD, 9.2 LTS, 9.3 CD, and 9.3 LTS could allow a remote attacker to cause a denial of service due to an error processing invalid data. IBM X-Force ID: 248418.

Vulnerability class: Buffer Overflow

Published 2023-05-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.009 (59.7th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

IBM Mq — versions 9.2 CD, 9.2 LTS, 9.3 CD, 9.3 LTS
IBM Mq Appliance

Weakness classification (CWE)

References

www.ibm.com/support/pages/node/6986563 (vendor-advisory, Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/248418 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2023-26285?: CVE-2023-26285 is a medium-severity vulnerability in IBM Mq, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.9/10. Published 2023-05-05.
How severe is CVE-2023-26285?: Medium severity. CVSS v3 base score is 5.9 out of 10.