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Security Bulletin: IBM API Connect is affected by a denial of service vulnerability via large JSON payloads (CVE-2018-1779)

Security Bulletin


API Connect has addressed the following vulnerability.

The management microservice in API Connect version 2018.1 through 2018.3.7 is vulnerable to denial of service attacks via large JSON payloads. An attacker can flood the management service with unauthenticated api requests with large JSON payloads. This could result in the server allocating disproportionate computing resources to process the malicious requests causing the server to crash.

Vulnerability Details

CVEID: CVE-2018-1779
DESCRIPTION: IBM API Connect could allow an unauthenticated attacker to cause a denial of service due to not setting limits on JSON payload size.
CVSS Base Score: 7.5
CVSS Temporal Score: See for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

Affected API Connect Affected Versions
IBM API Connect 2018.1-2018.3.7


Product VRMF APAR Remediation / First Fix
IBM API Connect 2018.4.1 LI80361

Addressed in IBM API Connect V2018.4.1

Management Server is impacted.

Follow this link and find the appropriate Management Server package:



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Change History

November 16, 2018: 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.


Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

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Product Synonym

API Connect

Document Information

Modified date:
15 November 2018