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CVE-2026-3157 IBM CVE debrief

IBM Sterling B2B Integrator and IBM Sterling File Gateway are vulnerable to an information disclosure due to sensitive information being included in source code comments of a mailbox component. This vulnerability, with a CVSS score of 4.3, indicates a medium severity risk. Affected versions include IBM Sterling B2B Integrator 6.2.0.0 through 6.2.0.5_2, 6.2.1.0 through 6.2.1.1_2, and 6.2.2.0 through 6.2.2.0_1, as well as IBM Sterling File Gateway 6.2.0.0 through 6.2.0.5_2, 6.2.1.0 through 6.2.1.1_2, and 6.2.2.0 through 6.2.2.0_1. The information disclosure could potentially allow attackers to access sensitive data through the mailbox component, emphasizing the need for immediate attention and remediation.

Vendor
IBM
Product
Sterling B2B Integrator
CVSS
MEDIUM 4.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-28
Original CVE updated
2026-08-03
Advisory published
2026-07-28
Advisory updated
2026-08-03

Who should care

IBM Sterling B2B Integrator and IBM Sterling File Gateway users, administrators, and security teams should be aware of this vulnerability and take necessary actions to remediate it.

Technical summary

The vulnerability is due to sensitive information being included in source code comments of a mailbox component in IBM Sterling B2B Integrator and IBM Sterling File Gateway. Affected versions include IBM Sterling B2B Integrator 6.2.0.0 through 6.2.0.5_2, 6.2.1.0 through 6.2.1.1_2, and 6.2.2.0 through 6.2.2.0_1, as well as IBM Sterling File Gateway 6.2.0.0 through 6.2.0.5_2, 6.2.1.0 through 6.2.1.1_2, and 6.2.2.0 through 6.2.2.0_1. The CVSS score is 4.3, indicating a medium severity vulnerability.

Defensive priority

Medium priority due to the information disclosure vulnerability with a CVSS score of 4.3.

Recommended defensive actions

  • Inventory and verify affected IBM Sterling B2B Integrator and IBM Sterling File Gateway versions.
  • Apply vendor patches or updates to remediate the vulnerability.
  • Monitor for any suspicious activity related to the mailbox component.
  • Review source code comments for sensitive information.
  • Implement compensating controls to mitigate potential information disclosure.

Evidence notes

The CVE record and NVD details indicate that IBM Sterling B2B Integrator and IBM Sterling File Gateway are vulnerable to an information disclosure. The vulnerability is due to sensitive information being included in source code comments of a mailbox component. Affected versions include IBM Sterling B2B Integrator 6.2.0.0 through 6.2.0.5_2, 6.2.1.0 through 6.2.1.1_2, and 6.2.2.0 through 6.2.2.0_1, as well as IBM Sterling File Gateway 6.2.0.0 through 6.2.0.5_2, 6.2.1.0 through 6.2.1.1_2, and 6.2.2.0 through 6.2.2.0_1.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-3157 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-3157

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-3157 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-3157

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.