CVE-2026-18152 is a vulnerability in IBM Financial Transaction Manager (FTM) for RedHat OpenShift version 4.0.6.0 where improper verification of cryptographic signatures (CWE-347) allows a remote attacker to forge messages that are accepted as validly signed. This could enable the attacker to perform unauthorized actions by exploiting the signature verification flaw. The vulnerability has a CVSS 3.1 score of 7.4, indicating high severity. No patch or vendor advisory details are provided in the input data.

The vulnerability enables remote attackers to forge cryptographic signatures, potentially allowing unauthorized message injection or manipulation within IBM Financial Transaction Manager (FTM) for RedHat OpenShift. This could lead to integrity violations and unauthorized actions within the affected system. There is no indication of confidentiality or availability impact. No known exploits have been reported in the wild.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, monitor IBM's security advisories for updates. No specific temporary mitigations are provided in the available data.