Security Bulletin
Summary
IBM Watson Speech Services Cartridge is vulnerable to memory allocation and data amplification issues in Amazon ion-java which could cause a denial of service condition. Amazon ion-java is used in our Speech microservices. These vulnerabilities have been addressed. Please read the details for remediation below.
Vulnerability Details
CVEID: CVE-2026-75935
DESCRIPTION: Uncontrolled memory allocation in the binary Ion stream cursor in Amazon ion-java before 1.12.0 might allow remote actors to cause a denial of service via a crafted Ion binary document containing a declared-length field that causes excessive heap preallocation.
To remediate this issue, users should upgrade to version 1.12.0.
CWE: CWE-789: Memory Allocation with Excessive Size Value
CVSS Source: AMZN
CVSS Base score: 7.5
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVEID: CVE-2026-75936
DESCRIPTION: Improper handling of highly compressed data in the GZIP auto-decompression handler in Amazon ion-java before 1.12.0 might allow remote actors to cause a denial of service via a crafted compressed Ion document that expands to an arbitrarily large size upon decompression.
To remediate this issue, users should upgrade to version 1.12.0 and configure withGzipDecompressionEnabled(false) and/or set an explicit withMaximumBufferSize() when parsing untrusted input.
CWE: CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)
CVSS Source: AMZN
CVSS Base score: 7.5
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVEID: CVE-2026-85786
DESCRIPTION: Improper handling of highly compressed data in Amazon ion-java before 1.12.1 might allow remote attackers to cause a denial of service via a crafted compressed Ion document that expands to an arbitrarily large size upon decompression due to insufficient coverage of the GZIP auto-decompression opt-out introduced for CVE-2026-75936.
To remediate this issue, users should upgrade to version 1.12.1.
CWE: CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)
CVSS Source: AMZN
CVSS Base score: 7.5
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Affected Products and Versions
| Affected Product(s) | Version(s) |
| IBM Watson Speech Services Cartridge | 4.0.0 - 5.4.0 |
Remediation/Fixes
| Product(s) | Version(s) | Remediation/Fix/Instructions |
| IBM Watson Speech Services Cartridge | 5.4.0 Patch 8 | The fix in 5.4.0 Patch 8 applies to all versions listed (4.0.0-5.4.0). The newest version of 5.4.0 with the included Patch 8 can be downloaded and installed from: https://www.ibm.com/docs/en/cloud-paks/cp-data/5.4.x |
Workarounds and Mitigations
None
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References
Acknowledgement
Change History
22 Oct 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:
22 October 2026
Initial Publish date:
22 October 2026
UID
ibm17293587