CVE-2026-18505

Description

IBM Financial Transaction Manager (FTM) for RedHat OpenShift is vulnerable to open redirect in the PMP `HostHeaderFilter` (`HostHeaderFilter.java:151`). An unauthenticated attacker can craft a request with a manipulated `Host` header to redirect authenticated operators to attacker-controlled sites, enabling credential phishing.

Overview

State: PUBLISHED
Assigner (CNA): ibm
CVSS severity: MEDIUM
CVSS score: 5.4 / 10
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Effective score: 5.4 / 10 MEDIUM source: CNA overview
CWE(s): CWE-601
Reserved: 2026-07-31
Published: 2026-09-23 15:46 UTC
Last updated: 2026-09-23 17:46 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/18xxx/CVE-2026-18505.json

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-09-23 16:16:41 UTC
NVD last modified: 2026-09-23 18:17:08 UTC
NVD CVSS v3.1: 5.4 / 10 MEDIUM source: psirt@us.ibm.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Exploitability subscore: 2.8 / 10
Impact subscore: 2.5 / 10

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-85353
Assigner: ibm
Published: Sep 23, 2026, 3:46:10 PM
Updated: Sep 23, 2026, 5:46:14 PM
EUVD base score (CVSS 3.1): 5.4 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
EUVD-reported EPSS: 0.0000
Vendors: IBM
Products: Financial Transaction Manager (FTM) for RedHat OpenShift (4.0.6.0 ≤4.0.10.0)
Aliases: GHSA-fj39-4fcg-5f6v

ENISA description: IBM Financial Transaction Manager (FTM) for RedHat OpenShift is vulnerable to open redirect in the PMP `HostHeaderFilter` (`HostHeaderFilter.java:151`). An unauthenticated attacker can craft a request with a manipulated `Host` header to redirect authenticated operators to attacker-controlled sites, enabling credential phishing.

EUVD references (1)

https://www.ibm.com/support/pages/node/7288641

Affected products (1)

Vendor	Product	Versions	Platforms
IBM	Financial Transaction Manager (FTM) for RedHat OpenShift	`4.0.6.0` (affected)	—

Vendor references (1)

References embedded in the original CVE record by the assigning CNA.

https://www.ibm.com/support/pages/node/7288641 vendor-advisorypatch

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (1)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://www.ibm.com/support/pages/node/7288641 psirt@us.ibm.com

Remediations (10)

CVE-2026-18556 / CVE-2026-18577 - Arctic Wolf

web:arcticwolf.com

Learn how to protect N-able N-central from active exploitation of CVE - 2026 -18556 and CVE - 2026 -18577 with patching, threat hunting, and mitigation guidance.

2026-09-24 11:53 UTC
Security Update Guide - Microsoft

web:msrc.microsoft.com

The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.

2026-09-24 11:53 UTC
Cisco Advance Notification for Publication of September 16, 2026 ...

web:sec.cloudapps.cisco.com

On September 16, 2026 , the Cisco Product Security Incident Response Team (PSIRT) published the advisories that are listed in the following tables. To remediate these vulnerabilities, Cisco strongly recommends that customers upgrade to the fixed software that is indicated in the advisories. For more information about changes in Cisco PSIRT vulnerability disclosure, see Strengthening the ...

2026-09-24 11:53 UTC
Microsoft Patch Tracker (September 2026): Exploit-Ranked | Senserva

web:senserva.com

Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.

2026-09-24 11:53 UTC
July 2026 Patch Tuesday: Updates and Analysis | CrowdStrike

web:www.crowdstrike.com

Microsoft has released security updates for 622 vulnerabilities in its July 2026 Patch Tuesday rollout.

2026-09-24 11:53 UTC
CVE-2026-18505 - Detail CVSS, EPSS & CISA Kev | CVE Find

web:www.cvefind.com

Full details for CVE-2026-18505 : technical description, impact, CVSS/EPSS scores, linked CWE, CAPEC, affected CPEs, disclosure date, and mitigation options.

2026-09-24 11:53 UTC
Oracle Critical Patch Update Advisory - July 2026

web:www.oracle.com

This Critical Patch Update contains 1448 new security patches across the product families listed below. Please note that a My Oracle Support (MOS) note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at July 2026 Critical Patch Update: Executive Summary and Analysis.

2026-09-24 11:53 UTC
July Patch RoguePlanet Tuesday Kills Windows Kerberos RC4 Rollback ...

web:www.techtimes.com

July 2026 Patch Tuesday permanently removes the Kerberos RC4 rollback registry key on July 14, leaving service accounts with RC4-only material unable to authenticate. Administrators must also ...

2026-09-24 11:53 UTC
CVE-2026-18505 - Tenable

web:www.tenable.com

IBM Financial Transaction Manager (FTM) for RedHat OpenShift is vulnerable to open redirect in the PMP `HostHeaderFilter` (`HostHeaderFilter.java:151`). An unauthenticated attacker can craft a request with a manipulated `Host` header to redirect authenticated operators to attacker-controlled sites, enabling credential phishing.

2026-09-24 11:53 UTC
Patch Tuesday September 2026: Security Updates & CVE Analysis

web:zecurit.com

Get the complete breakdown of Microsoft's September 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

2026-09-24 11:53 UTC

AI Forensic Analysis

Only Available for Registered Users. Sign in to view.

Raw JSON

The full cvelistV5 record. Download as CVE-2026-18505.json.

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-18505",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-23T17:45:51.817996Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-23T17:46:14.301Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:ibm:financial_transaction_manager_ftmfor_redhat_openshift:4.0.6.0:*:*:*:*:*:*:*"
          ],
          "product": "Financial Transaction Manager (FTM)\u00a0for RedHat OpenShift",
          "vendor": "IBM",
          "versions": [
            {
              "lessThanOrEqual": "4.0.10.0",
              "status": "affected",
              "version": "4.0.6.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "<p>IBM Financial Transaction Manager (FTM) for RedHat OpenShift is vulnerable to open redirect in the PMP `HostHeaderFilter` (`HostHeaderFilter.java:151`). An unauthenticated attacker can craft a request with a manipulated `Host` header to redirect authenticated operators to attacker-controlled sites, enabling credential phishing.</p>"
            }
          ],
          "value": "IBM Financial Transaction Manager (FTM) for RedHat OpenShift is vulnerable to open redirect in the PMP `HostHeaderFilter` (`HostHeaderFilter.java:151`). An unauthenticated attacker can craft a request with a manipulated `Host` header to redirect authenticated operators to attacker-controlled sites, enabling credential phishing."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-601",
              "description": "CWE-601 URL Redirection to Untrusted Site ('Open Redirect')",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-23T15:46:10.518Z",
        "orgId": "9a959283-ebb5-44b6-b705-dcc2bbced522",
        "shortName": "ibm"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://www.ibm.com/support/pages/node/7288641"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "<p>IBM strongly recommends addressing the vulnerabilities now by updating FTM deployments to the following</p><p></p><div><table><tbody><tr><td>Affected Product(s)</td><td>Resolved by VRMF</td><td>Remediation / First Fix</td></tr><tr><td>Financial Transaction Manager (FTM)\u00a0for RedHat OpenShift</td><td>4.0.11.0</td><td><a href=\"https://www.ibm.com/support/pages/node/7285661\" rel=\"nofollow\">FTM 4.0.11.0</a></td></tr></tbody></table></div>"
            }
          ],
          "value": "IBM strongly recommends addressing the vulnerabilities now by updating FTM deployments to the following\n\n\n\n\n\nAffected Product(s)Resolved by VRMFRemediation / First FixFinancial Transaction Manager (FTM)\u00a0for RedHat OpenShift4.0.11.0 FTM 4.0.11.0 https://www.ibm.com/support/pages/node/7285661"
        }
      ],
      "title": "IBM Financial Transaction Manager (FTM) is Impacted by Multiple Vulnerabilities"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9a959283-ebb5-44b6-b705-dcc2bbced522",
    "assignerShortName": "ibm",
    "cveId": "CVE-2026-18505",
    "datePublished": "2026-09-23T15:46:10.518Z",
    "dateReserved": "2026-07-31T17:04:02.476Z",
    "dateUpdated": "2026-09-23T17:46:14.301Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}