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Security Bulletin: IBM API Connect V5 is potentially impacted by a weak cipher (CVE-2019-4256)

Security Bulletin


API Connect has addressed the following vulnerability.

Vulnerability Details

CVEID: CVE-2019-4256
DESCRIPTION: IBM API Connect uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive information.
CVSS Base Score: 5.9
CVSS Temporal Score: See for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)

Affected Products and Versions

Affected IBM API Management Affected Versions
IBM API Connect


Affected Product Fixed in VRMF APAR Remediation / First Fix
IBM API Connect V5.0.0.0- iFix


Addressed in IBM API Connect V5.0.8.6 iFix.

Developer Portal is impacted.

Follow this link and find the appropriate "APIConnect-Portal" package for your installation:

Workarounds and Mitigations


Get Notified about Future Security Bulletins


Complete CVSS v3 Guide
On-line Calculator v3

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

May 22, 2019: Original bulletin published

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.


According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

Product Alias/Synonym

API Connect

Document information

More support for: IBM API Connect

Software version:

Operating system(s): Platform Independent

Reference #: 0882968

Modified date: 22 May 2019