What is CVE-2018-1991?

CVE-2018-1991 is a low-severity vulnerability in IBM API Connect, classified under Information Disclosure. CVSS score: 2.7/10. Published 2019-05-22.

How severe is CVE-2018-1991?

Low severity. CVSS v3 base score is 2.7 out of 10.

Information disclosure in IBM API Connect

CVE-2018-1991

IBM API Connect 5.0.0.0, and 5.0.8.6 could could return sensitive information that could provide critical information as to the underlying software stack in CMC UI headers. IBM X-Force ID: 154284.

Vulnerability class: Information Disclosure

Published 2019-05-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 2.7 (Low). Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.010 (60.1th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: -0.000

Affected products

IBM API Connect — versions 5.0.8.6, 5.0.0.0
IBM API Connect

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

www.ibm.com/support/docview.wss (Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/154284 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2018-1991?: CVE-2018-1991 is a low-severity vulnerability in IBM API Connect, classified under Information Disclosure. CVSS score: 2.7/10. Published 2019-05-22.
How severe is CVE-2018-1991?: Low severity. CVSS v3 base score is 2.7 out of 10.