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IBM FTM CVE-2026-18872

| EUVDEUVD-2026-85354 CRITICAL
Cross-site Scripting (XSS) (CWE-79)
2026-09-23 ibm GHSA-r4f9-2vq5-44rh
9.3
CVSS 3.1 · Vendor: ibm
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Severity by source

Vendor (ibm) PRIMARY
9.3 CRITICAL
AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
vuln.today AI
8.5 HIGH

AV:A because injection rides adjacent payment-network data; PR:N as the injection point is unauthenticated; UI:R because a stored XSS needs an operator to view the page; S:C and C:H/I:H for session theft and payment actions.

3.1 AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
4.0 AV:A/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N

Primary rating from Vendor (ibm).

CVSS VectorVendor: ibm

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None

Lifecycle Timeline

3
Metadata Corrected
Sep 23, 2026 - 16:40 vuln.today
tag: Openshift added
Analysis Generated
Sep 23, 2026 - 16:18 vuln.today
CVE Published
Sep 23, 2026 - 15:46 cve.org
CRITICAL 9.3

DescriptionCVE.org

IBM Financial Transaction Manager (FTM) for RedHat OpenShift is vulnerable to stored cross-site scripting (CWE-79) in the FTM UI NetworkAcknowledgement React component (NetworkAcknowledgement.jsx:42). A malicious actor can inject script into stored network acknowledgement data that executes in authenticated operator browsers, enabling session hijacking and unauthorized operator-level payment actions.

AnalysisAI

Stored cross-site scripting in IBM Financial Transaction Manager (FTM) for Red Hat OpenShift allows an attacker with adjacent-network positioning to plant script inside stored network acknowledgement data, which then executes in the browsers of authenticated FTM operators and can lead to session hijacking and unauthorised operator-level payment actions. The flaw sits in the NetworkAcknowledgement React component (NetworkAcknowledgement.jsx:42), which renders stored acknowledgement content without adequate output encoding. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires (1) the FTM UI to be deployed with the NetworkAcknowledgement React component and processing network acknowledgement data, (2) attacker ability to inject into that stored network-acknowledgement data via the adjacent payment network (AV:A limits this to attackers with network positioning, not arbitrary internet clients), and (3) a legitimate authenticated FTM operator subsequently viewing the affected view for the stored payload to execute - this operator-viewing step is a practical limiting factor despite the vendor's UI:N rating. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment This is a stored XSS (CWE-79) in a financial payments platform, so the impact ceiling is high despite XSS often being underrated. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Apply the vendor fix: IBM has published a patch via the support bulletin https://www.ibm.com/support/pages/node/7288641, and remediation status is patch available per vendor advisory - administrators should follow that page to the FTM for Red Hat OpenShift fix pack level that addresses the NetworkAcknowledgement component and confirm the deployed image tag matches the corrected build, since no standalone fix version is published in the available data. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, confirm whether IBM Financial Transaction Manager for Red Hat OpenShift is deployed in your environment, identify the affected version in use, and consult IBM's security advisory for CVE-2026-18872 to obtain the exact patched release; isolate the FTM acknowledgement service on a segmented network segment so only trusted operator workstations and management hosts can reach it, and require operators to log out of idle FTM sessions. …

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CVE-2026-18872 vulnerability details – vuln.today

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