# CVE-2026-18152: IBM Financial Transaction Manager cryptographic signature verification bypass

Source: https://junglewise.ai/threats/cve-2026-18152-ibm-financial-transaction-manager-ftm-for-redhat-openshift-could  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-22. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-18152 · Severity: high · CVSS 7.4 · Published 2026-09-22

IBM Financial Transaction Manager (FTM), which processes financial transactions and payments on RedHat OpenShift, contains a flaw that allows remote attackers to forge validly-signed messages by bypassing cryptographic signature verification. An attacker exploiting this could impersonate legitimate payment instructions, modify transactions, or inject fraudulent financial messages without detection, potentially leading to unauthorized fund transfers or system compromise.

Technologies: [IBM Financial Transaction Manager](https://junglewise.ai/threats/technologies/financial-transaction-manager). Vendors: [IBM](https://junglewise.ai/threats/vendors/ibm).

## Quick answers

**Is CVE-2026-18152 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-18152 being exploited in the wild.

**How severe is CVE-2026-18152?** High severity, with a CVSS score of 7.4, published 22 September 2026.

**Which products and versions are affected?** IBM Financial Transaction Manager.

**Is there a fix for CVE-2026-18152?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-18152 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-18152?** Check whether you run IBM Financial Transaction Manager. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability stems from improper verification of cryptographic signatures in FTM, allowing an attacker to forge validly-signed messages and bypass signature validation controls. The attack is network-accessible and requires no authentication or special preconditions. Successful exploitation grants the attacker the ability to fabricate trusted messages and compromise transaction integrity.

## Affected products

- IBM Financial Transaction Manager

## Timeline

- 2026-09-22: disclosed

## References

- [https://www.ibm.com/support/pages/node/7288641](https://www.ibm.com/support/pages/node/7288641)

## Related threats

- [IBM Financial Transaction Manager XML external entity injection](https://junglewise.ai/threats/cve-2026-93030-ftm-4-x-all-could-allow-a-remote-authenticated-attacker-to-obtain)
- [IBM Financial Transaction Manager missing authentication in Business Rules Manager](https://junglewise.ai/threats/cve-2026-19267-ibm-financial-transaction-manager-ftm-for-redhat-openshift-is)
- [IBM Financial Transaction Manager boolean-based SQL injection](https://junglewise.ai/threats/cve-2026-19179-ibm-financial-transaction-manager-ftm-for-redhat-openshift-could)
- [IBM Financial Transaction Manager privilege escalation in container](https://junglewise.ai/threats/cve-2026-19087-ibm-financial-transaction-manager-ftm-for-redhat-openshift-could)
- [IBM Financial Transaction Manager RAG poisoning via unauthenticated runbook](https://junglewise.ai/threats/cve-2026-18875-ibm-financial-transaction-manager-ftm-for-redhat-openshift-is)