What is the CVSS score of CVE-2026-17443?

CVE-2026-17443 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.3%.

Is there a patch available for CVE-2026-17443?

Yes, a patch is available for CVE-2026-17443. Update the affected software to the latest version immediately.

IBM App Connect Enterprise CVE-2026-17443

EUVD-2026-71472 MEDIUM

Improper Restriction of XML External Entity Reference (CWE-611)

2026-09-04 ibm

GHSA-v53j-r3c3-j92c

IBM XXE App Connect Enterprise Integration Bus For Z Os

6.5

CVSS 3.1 · NVD

Severity by source

Vendor (ibm) PRIMARY

MEDIUM

qualitative

NVD

6.5 MEDIUM

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

vuln.today AI

5.3 MEDIUM

Network-accessible but requires authentication (PR:L) and unspecified high-complexity conditions (AC:H); impact is confidentiality-only with no integrity or availability effect.

3.1 AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

4.0 AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (ibm).

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

CVSS changed

Sep 09, 2026 - 16:22 NVD

5.3 (MEDIUM) 6.5 (MEDIUM)

Analysis Generated

Sep 04, 2026 - 17:15 vuln.today

DescriptionNVD

IBM App Connect Enterprise 13.0.1.0 through 13.0.8.1, and 12.0.1.0 through 12.0.12.28 and IBM Integration Bus for z/OS 10.1.0.0 through 10.1.0.7 could allow a remote authenticated attacker to obtain sensitive information due to an XML external entity (XXE) injection flaw.

AnalysisAI

XML external entity injection in IBM App Connect Enterprise (versions 12.0.1.0-12.0.12.28 and 13.0.1.0-13.0.8.1) and IBM Integration Bus for z/OS (10.1.0.0-10.1.0.7) enables a remote authenticated attacker to exfiltrate sensitive information from the server via maliciously crafted XML input. The CWE-611 flaw allows the underlying XML parser to resolve attacker-controlled external entity references, potentially exposing local files, environment data, or internal network resources. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation	Exploitation requires a valid authenticated account with at least low-privileged access (PR:L) to an IBM App Connect Enterprise or IBM Integration Bus for z/OS endpoint that processes attacker-supplied XML. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	The CVSS 3.1 base score of 5.3 (Medium) is driven by AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N. … 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	IBM has released a patch; administrators should consult the vendor advisory at https://www.ibm.com/support/pages/node/7286372 for exact fix versions and apply the available update to IBM App Connect Enterprise and IBM Integration Bus for z/OS as the primary remediation. … Detailed patch versions, workarounds, and compensating controls in full report.