Security Bulletin
Summary
IBM App Connect for Manufacturing is vulnerable to multiple vulnerabilities due to open62541.
Vulnerability Details
CVEID: CVE-2026-63035
DESCRIPTION: A heap use-after-free vulnerability in the TransferSubscriptions service
in open62541 may allow an authenticated attacker to cause a denial of
service or potentially execute arbitrary code.
CWE: CWE-416: Use After Free
CVSS Source: ics-cert@hq.dhs.gov
CVSS Base score: 8.1
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H)
CVEID: CVE-2026-63362
DESCRIPTION: An unsigned integer underflow in the PubSub signature verification path
in open62541 may allow a remote attacker to cause a denial of service
via a crafted UDP packet.
CWE: CWE-191: Integer Underflow (Wrap or Wraparound)
CVSS Source: ics-cert@hq.dhs.gov
CVSS Base score: 5.9
CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVEID: CVE-2026-63559
DESCRIPTION: An integer overflow in the UA_Variant arrayDimensions product
computation in open62541 may allow a remote attacker to read
out-of-bounds heap memory, potentially disclosing sensitive information.
CWE: CWE-190: Integer Overflow or Wraparound
CVSS Source: ics-cert@hq.dhs.gov
CVSS Base score: 7.5
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
CVEID: CVE-2026-65423
DESCRIPTION: An integer overflow in the UA_Variant arrayDimensions product
computation in open62541 may allow a remote attacker to trigger an
out-of-bounds write.
CWE: CWE-190: Integer Overflow or Wraparound
CVSS Source: ics-cert@hq.dhs.gov
CVSS Base score: 8.8
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
CVEID: CVE-2026-15690
DESCRIPTION: A vulnerability was identified in open62541 up to 1.5.5. Affected by this issue is the function responseReadNamespacesArray of the file src/client/ua_client_connect.c of the component Shared Client Library. Such manipulation of the argument Server_NamespaceArray leads to null pointer dereference. The attack can be executed remotely. The attack requires a high level of complexity. The exploitation is known to be difficult. The exploit is publicly available and might be used. The project closed the issue report, stating that this is not the official way to report a security vulnerability.
CWE: CWE-404: Improper Resource Shutdown or Release
CVSS Source: cna@vuldb.com
CVSS Base score: 3.1
CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L)
Affected Products and Versions
| Affected Product(s) | Version(s) |
| App Connect for Manufacturing | 13.0.0.0 - 13.0.1.0 |
Remediation/Fixes
| Affected Product(s) | Version(s) | APAR | Remediation / Fixes |
| IBM App Connect for Manufacturing | 13.0.0.0 - 13.0.1.0 | IT49738 & IT49739 |
Interim fix for APAR (IT49738 & IT49739) is available for IBM App Connect for Manufacturing 13.0.1.0 from |
Workarounds and Mitigations
None
Get Notified about Future Security Bulletins
References
Acknowledgement
Change History
17 Aug 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:
17 August 2026
Initial Publish date:
17 August 2026
UID
ibm17283960