# CVE-2026-18161: IBM Financial Transaction Manager audit log falsification via HTTP header validation

Source: https://junglewise.ai/threats/cve-2026-18161-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-2026-18161 · Severity: medium · CVSS 4.3 · Published 2026-09-22

IBM Financial Transaction Manager (FTM), a system that processes and manages financial transactions for organizations, contains a vulnerability that allows authenticated attackers to falsify transaction audit logs through improper validation of HTTP headers. This means attackers could tamper with the audit trail to hide unauthorized transactions or cover their tracks, undermining compliance and forensic investigation capabilities.

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-2026-18161 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-18161 being exploited in the wild.

**How severe is CVE-2026-18161?** Medium severity, with a CVSS score of 4.3, published 22 September 2026.

**Which products and versions are affected?** IBM Financial Transaction Manager 4.x and earlier.

**Is there a fix for CVE-2026-18161?** 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-2026-18161 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-18161?** Check whether you run IBM Financial Transaction Manager at an affected version. 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

An authenticated attacker can exploit improper validation of a client-supplied HTTP header to falsify transaction audit logs in IBM FTM. The vulnerability requires prior authentication but allows an attacker with valid credentials to manipulate audit records via a network-based attack. A fix is available from IBM.

## Affected products

- IBM Financial Transaction Manager 4.x and earlier

## 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)