CVE-2026-18123
HIGH 7.6IBM Financial Transaction Manager (FTM) for RedHat OpenShift could allow a remote attacker to cause a denial of service due to the improper use of reflection with externally controlled input.
ELEVATED IMPACT
Severe if exploited (CVSS 7.6), but no known exploitation and low modeled probability. Patch on a normal cadence.
Exploitation likelihood
0.3%chance of exploitation in 30 days · 17th percentile
○ In CISA KEV
○ Public exploit / PoC
Impact if exploited
7.6CVSS 3.1 · HIGH
- ConfidentialityLow
- IntegrityLow
- AvailabilityHigh
What an attacker needs
- ⚠Access: Must sit on the same / adjacent network
- ✓Privileges: No account or privileges required
- ✓User interaction: No user interaction needed
- ✓Complexity: No special conditions — reliably repeatable
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept & exploit code
- github-search Search GitHub for public PoC repos
Test against your own equipment
curl -s https://vulnpedia.com/cve/CVE-2026-18123/poc.jsonMachine-readable PoC index for this CVE (for automation).Listed for defensive triage, patch verification, and authorized testing on systems you own. Machine-readable: /cve/CVE-2026-18123/poc.json
Affected
Products Financial Transaction Manager (Ftm) For Redhat Openshift Financial Transaction Manager Openshift
Weakness (CWE)
- CWE-470: Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Known Affected Software Configurations
| Vendor | Product | Version range |
|---|---|---|
| Ibm | Financial Transaction Manager | ≥ 4.0.7.0 and < 4.0.11.0 |
| Ibm | Financial Transaction Manager | 4.0.6.0 |
| Ibm | Financial Transaction Manager | 4.0.6.0 |
| Ibm | Financial Transaction Manager | 4.0.6.0 |
| Ibm | Financial Transaction Manager | 4.0.6.0 |
| Ibm | Financial Transaction Manager | 4.0.6.0 |
| Ibm | Financial Transaction Manager | 4.0.6.0 |
| Ibm | Financial Transaction Manager | 4.0.6.0 |
All CVSS metrics
- HIGH 7.6 v3.1 · CNA Primary
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - HIGH 7.6 v3.1 · NVD Secondary
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - HIGH 7.5 v3.1 · NVD Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H