IBM Support

Security Bulletin: IBM CICS TX Standard is vulnerable to HTTP Header injection (CVE-2022-34306)

Security Bulletin


IBM CICS TX Standard could allow a remote attacker to invoke cross-site scripting, cache poisoning or session hijacking attacks on a vulnerable system. The fix removes this vulnerability (CVE-2022-34306) from IBM CICS TX Standard.

Vulnerability Details

CVEID:   CVE-2022-34306
DESCRIPTION:   IBM CICS TX is vulnerable to HTTP header injection, caused by improper validation of input by the HOST headers. This could allow an attacker to conduct various attacks against the vulnerable system, including cross-site scripting, cache poisoning or session hijacking.
CVSS Base score: 5.4
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N)

Affected Products and Versions

Affected Product(s)Version(s)
IBM CICS TX StandardAll


IBM strongly recommends addressing the vulnerability by downloading and applying the interim fixes from the table below  


VersionDefectRemediation / First Fix
IBM CICS TX Standard
127642Download fix from here


Workarounds and Mitigations


Get Notified about Future Security Bulletins



Change History

06 Jul 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


[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSZ5810","label":"CICS TX"},"Component":"","Platform":[{"code":"PF016","label":"Linux"}],"Version":"11.1","Edition":"","Line of Business":{"code":"LOB35","label":"Mainframe SW"}}]

Document Information

Modified date:
14 February 2023