What is CVE-2018-1388?

CVE-2018-1388 is a high-severity vulnerability in IBM Websphere Mq, classified under Information Disclosure. CVSS score: 7.5/10. Published 2018-02-07.

How severe is CVE-2018-1388?

High severity. CVSS v3 base score is 7.5 out of 10.

Information disclosure in IBM Websphere Mq

CVE-2018-1388

GSKit V7 may disclose side channel information via discrepancies between valid and invalid PKCS#1 padding. IBM X-Force ID: 138212.

Vulnerability class: Information Disclosure

Published 2018-02-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.022 (81.4th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 81.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.022 · newest: 0.022 · change: 0.000

Affected products

IBM Websphere Mq — versions 7.0.1.4, 7.0.1.14, 7.0.1.12
IBM Websphere Mq — versions 7.0.1.0, 7.0.1.1, 7.0.1.2

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

www.securityfocus.com/bid/103698 (vdb-entry)
www.ibm.com/support/docview.wss (Mitigation, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/138212 (VDB Entry, Vendor Advisory)

Frequently asked questions

What is CVE-2018-1388?: CVE-2018-1388 is a high-severity vulnerability in IBM Websphere Mq, classified under Information Disclosure. CVSS score: 7.5/10. Published 2018-02-07.
How severe is CVE-2018-1388?: High severity. CVSS v3 base score is 7.5 out of 10.