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Security Bulletin: Vulnerability in Curl affects IBM Cloud Private and could allow a remote attacker to bypass security restrictions (CVE-2021-22926)

Security Bulletin


There is a vulnerability in the Curl open source library. Curl is used by IBM Cloud Private to transfer data . The vulnerability could allow a remote attacker to bypass security restrictions. This bulletin identifies the security fixes to apply to address the Curl vulnerability (CVE-2021-22926)

Vulnerability Details

CVEID:   CVE-2021-22926
DESCRIPTION:   Curl libcurl could allow a remote attacker to bypass security restrictions, caused by a flaw in the CURLOPT_SSLCERT option mixup with TLS library Secure Transport. By creating a specially-crafted file name with the same name as the app wants to use by name, an attacker could exploit this vulnerability to trick the application to use the file based cert instead of the one referred to by name, and allow libcurl to send the wrong client certificate in the TLS connection handshake.
CVSS Base score: 9.1
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N)

Affected Products and Versions

Affected Product(s)Version(s)
IBM Cloud Private3.1.0
IBM Cloud Private3.1.1
IBM Cloud Private3.1.2
IBM Cloud Private3.2.0
IBM Cloud Private3.2.1 CD
IBM Cloud Private3.2.2 CD


Product defect fixes and security updates are only available for the two most recent Continuous Delivery (CD) update packages
  • IBM Cloud Private 3.2.1
  • IBM Cloud Private 3.2.2


For IBM Cloud Private 3.2.1, apply fix pack:

For IBM Cloud Private 3.2.2, apply fix pack:

For IBM Cloud Private 3.1.0, 3.1.1, 3.1.2, 3.2.0

  • Upgrade to the latest Continuous Delivery (CD) update package, IBM Cloud Private 3.2.2. 
  • If required, individual product fixes can be made available between CD update packages for resolution of problems. Contact IBM support for assistance

Workarounds and Mitigations


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Change History

22 Apr 2022: Initial Publication

*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.

Document Location


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Document Information

Modified date:
20 May 2022