Security Bulletin
Summary
IBM App Connect Enterprise and IBM Integration Bus for z/OS Adapter nodes are vulnerable to multiple CVEs.
Vulnerability Details
CVEID: CVE-2026-17440
DESCRIPTION: IBM App Connect Enterprise could allow a local attacker to cause a denial of service due to uncontrolled recursion.
CWE: CWE-674: Uncontrolled Recursion
CVSS Source: IBM
CVSS Base score: 5.5
CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
CVEID: CVE-2026-16689
DESCRIPTION: IBM App Connect Enterprise could allow a local attacker to obtain sensitive information due to improper logging of credentials.
CWE: CWE-532: Insertion of Sensitive Information into Log File
CVSS Source: IBM
CVSS Base score: 6.2
CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
CVEID: CVE-2026-17443
DESCRIPTION: IBM App Connect Enterprise could allow a remote authenticated attacker to obtain sensitive information due to an XML external entity (XXE) injection flaw.
CWE: CWE-611: Improper Restriction of XML External Entity Reference
CVSS Source: IBM
CVSS Base score: 5.3
CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N)
CVEID: CVE-2026-81832
DESCRIPTION: IBM App Connect Enterprise SAP Adapter is vulnerable to an XML external entity (XXE) attack
CWE: CWE-611: Improper Restriction of XML External Entity Reference
CVSS Source: IBM
CVSS Base score: 7.7
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N)
CVEID: CVE-2026-17444
DESCRIPTION: IBM App Connect Enterprise could allow a remote authenticated attacker to obtain sensitive information due to an XML external entity (XXE) injection.
CWE: CWE-611: Improper Restriction of XML External Entity Reference
CVSS Source: IBM
CVSS Base score: 5.3
CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N)
CVEID: CVE-2026-19649
DESCRIPTION: IBM App Connect Enterprise could allow a local attacker to obtain sensitive information due to improper logging of database credentials.
CWE: CWE-532: Insertion of Sensitive Information into Log File
CVSS Source: IBM
CVSS Base score: 6.2
CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
CVEID: CVE-2026-78543
DESCRIPTION: IBM App Connect Enterprise could allow a remote attacker to cause a denial of service due to an infinite loop.
CWE: CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')
CVSS Source: IBM
CVSS Base score: 5.3
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
CVEID: CVE-2026-16180
DESCRIPTION: IBM App Connect Enterprise Toolkit could allow an authenticated user to cause a denial-of-service condition due to improper validation of XML entities.
CWE: CWE-776: Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')
CVSS Source: IBM
CVSS Base score: 5.7
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H)
CVEID: CVE-2026-17442
DESCRIPTION: IBM App Connect Enterprise could allow a local attacker to obtain sensitive information due to credentials being written to trace logs in cleartext.
CWE: CWE-532: Insertion of Sensitive Information into Log File
CVSS Source: IBM
CVSS Base score: 5.1
CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)
Affected Products and Versions
| Affected Product(s) | Version(s) |
| IBM App Connect Enterprise | 13.0.1.0 - 13.0.8.1 |
| IBM App Connect Enterprise | 12.0.1.0 - 12.0.12.28 |
| IBM Integration Bus for z/OS | 10.1.0.0 - 10.1.0.7 |
Remediation/Fixes
IBM strongly recommends addressing the vulnerability/vulnerabilities now by applying the appropriate fix to IBM App Connect Enterprise and IBM Integration Bus for z/OS
| Affected Product(s) | Version(s) | APAR |
Remediation / Fixes |
| IBM App Connect Enterprise | 13.0.1.0 - 13.0.8.1 | IT49773 |
The APAR (IT49773) is available from |
| IBM App Connect Enterprise | 12.0.1.0 - 12.0.12.28 | IT49773 |
The APAR (IT49773) is available from |
| IBM Integration Bus for z/OS | 10.1.0.0 - 10.1.0.7 | IT49773 |
Interim Fix for APAR (IT49773) is available to apply to 10.1.0.7 from |
Workarounds and Mitigations
None
Get Notified about Future Security Bulletins
References
Acknowledgement
Change History
04 Sep 2026: Initial Publication
*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.
Disclaimer
According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.
Document Location
Worldwide
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Document Information
Modified date:
04 September 2026
Initial Publish date:
04 September 2026
UID
ibm17286372