Security Bulletin
Summary
IBM Sterling B2B Integrator and IBM Sterling File Gateway have addressed these security vulnerabilities (CVE-2026-5588, CVE-2025-8916 , CVE-2025-14813, CVE-2026-5598, CVE-2026-0636, CVE-2026-3505).
Vulnerability Details
CVEID: CVE-2026-5588
DESCRIPTION: Use of a Broken or Risky Cryptographic Algorithm vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcpkix on all (pkix modules), Legion of the Bouncy Castle Inc. BCPKIX-FIPS bcpkix on All (pkix modules), Legion of the Bouncy Castle Inc. BCPIX-LTS bcpkix on All (pkix modules).
This vulnerability is associated with program files JcaContentVerifierProviderBuilder.Java, JcaContentVerfierProviderBuilder.Java.
This issue affects BC-JAVA: from 1.67 before 1.80.2, from 1.81 before 1.81.1, from 1.82 before 1.84; BCPKIX-FIPS: from 2.0.6 before 2.0.11, from 2.1.7 before 2.1.11; BCPIX-LTS: from 2.73.7 before 2.73.11.
CWE: CWE-327: Use of a Broken or Risky Cryptographic Algorithm
CVSS Source: redhat-SADP
CVSS Base score: 7.5
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)
CVEID: CVE-2025-8916
DESCRIPTION: Allocation of Resources Without Limits or Throttling vulnerability in Legion of the Bouncy Castle Inc. BC Java bcpkix on All (API modules), Legion of the Bouncy Castle Inc. BC Java bcprov on All (API modules), Legion of the Bouncy Castle Inc. BCPKIX FIPS bcpkix-fips on All (API modules) allows Excessive Allocation. This vulnerability is associated with program files https://github.Com/bcgit/bc-java/blob/main/pkix/src/main/java/org/bounc…, https://github.Com/bcgit/bc-java/blob/main/prov/src/main/java/org/bounc….
This issue affects BC Java: from 1.44 through 1.78; BC Java: from 1.44 through 1.78; BCPKIX FIPS: from 1.0.0 through 1.0.7, from 2.0.0 through 2.0.7.
CWE: CWE-770: Allocation of Resources Without Limits or Throttling
CVSS Source: NVD
CVSS Base score: 6.3
CVSS Vector: (CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:X/R:U/V:X/RE:M/U:Amber)
CVEID: CVE-2025-14813
DESCRIPTION: : Use of a Broken or Risky Cryptographic Algorithm vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcprov on all (core modules).
This vulnerability is associated with program files G3413CTRBlockCipher.
This issue affects BC-JAVA: from 1.59 before 1.80.2, from 1.81 before 1.81.1, from 1.82 before 1.84.
CWE: CWE-327: Use of a Broken or Risky Cryptographic Algorithm
CVSS Source: redhat-SADP
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-2026-5598
DESCRIPTION: Covert timing channel vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA core on all (core modules).
This vulnerability is associated with program files FrodoEngine.Java.
This issue affects BC-JAVA: from 1.71 before 1.80.2, from 1.81 before 1.81.1, from 1.82 before 1.84.
CWE: CWE-385: Covert Timing Channel
CVSS Source: redhat-SADP
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-2026-0636
DESCRIPTION: Improper neutralization of special elements used in an LDAP query ('LDAP injection') vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcprov on all (prov modules).
This vulnerability is associated with program files LDAPStoreHelper.
This issue affects BC-JAVA: from 1.74 before 1.80.2, from 1.81 before 1.81.1, from 1.82 before 1.84.
CWE: CWE-90: Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')
CVSS Source: redhat-SADP
CVSS Base score: 6.5
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N)
CVEID: CVE-2026-3505
DESCRIPTION: Allocation of resources without limits or throttling, Uncontrolled Resource Consumption vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcpg on all (pg modules).
This vulnerability is associated with program files AEADEncDataPacket.Java, BcAEADUtil.Java, JceAEADUtil.Java, OperatorHelper.Java.
This issue affects BC-JAVA: from 1.74 before 1.80.2, from 1.81 before 1.81.1, from 1.82 before 1.84.
CWE: CWE-400: Uncontrolled Resource Consumption
CVSS Source: redhat-SADP
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 Sterling B2B Integrator | 6.2.1.0 - 6.2.1.2_1, 6.2.2.0 - 6.2.2.1_1 |
| IBM Sterling File Gateway | 6.2.1.0 - 6.2.1.2_1, 6.2.2.0 - 6.2.2.1_1 |
Remediation/Fixes
| Product | Version | APAR | Remediation & Fix |
| IBM Sterling B2B Integrator | 6.2.1.0 - 6.2.1.2_1 | IT49942 | Apply 6.2.1.3 |
| IBM Sterling File Gateway | 6.2.1.0 - 6.2.1.2_1 | IT49942 | Apply 6.2.1.3 |
| IBM Sterling B2B Integrator | 6.2.2.0 - 6.2.2.1_1 | IT49942 | Apply 6.2.2.2 |
| IBM Sterling File Gateway | 6.2.2.0 - 6.2.2.1_1 | IT49942 | Apply 6.2.2.2 |
The IIM versions 6.2.1.3 and 6.2.2.2 are available on Fix Central.
The container versions of 6.2.1.3 and 6.2.2.2 are available in IBM Entitled Registry
- cp.icr.io/cp/ibm-b2bi for IBM Sterling B2B Integrator
- cp.icr.io/cp/ibm-sfg for IBM Sterling File Gateway
Workarounds and Mitigations
None
Get Notified about Future Security Bulletins
References
Acknowledgement
Change History
20 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:
20 October 2026
Initial Publish date:
20 October 2026
UID
ibm17293161