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PatchSiren cyber security CVE debrief

CVE-2026-4405 IBM CVE debrief

IBM Concert Software Use of Web Browser Cache Containing Sensitive Information. The vulnerability affects IBM Concert versions 1.0 through 3.0.0, allowing web page cache to be stored locally, which can be read by another user on the system. This issue has a CVSS score of 4 (Medium). System administrators and security teams should assess exposure and implement necessary mitigations. The potential exposure of sensitive information and unauthorized access to cached data by other users on the system necessitates review and update of IBM Concert software, implementation of proper access controls, and monitoring of system logs.

Vendor
IBM
Product
Concert
CVSS
MEDIUM 4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-19
Original CVE updated
2026-10-19
Advisory published
2026-10-19
Advisory updated
2026-10-19

Who should care

System administrators and security teams responsible for IBM Concert software installations should assess exposure and implement necessary mitigations.

Why it matters

This vulnerability requires attention from system administrators and security teams responsible for IBM Concert software installations. The potential exposure of sensitive information and unauthorized access to cached data by other users on the system necessitates review and update of IBM Concert software, implementation of proper access controls, and monitoring of system logs.

  • Potential exposure of sensitive information due to web page cache storage.
  • Unauthorized access to cached data by other users on the system.
  • Need for review and update of IBM Concert software to prevent sensitive information exposure.
  • Monitoring system logs for potential sensitive information exposure.

Technical summary

IBM Concert 1.0 through 3.0.0 allows web page cache to be stored locally, which can be read by another user on the system. This vulnerability has a CVSS score of 4 (Medium). The affected product deployments should be reviewed for exposure, and necessary mitigations should be implemented. The vulnerability class involves sensitive information exposure due to web page cache storage. Defensive impact includes the need for review and update of IBM Concert software to prevent sensitive information exposure, implementation of proper access controls and file system

Defensive priority

Medium-priority vulnerability requiring immediate attention due to potential for sensitive information exposure.

Recommended defensive actions

  • Review and update IBM Concert software to ensure sensitive information is not stored in web page cache.
  • Implement proper access controls and file system permissions to prevent unauthorized access to cached data.
  • Monitor system logs for potential sensitive information exposure.

Evidence notes

The CVE record and source item indicate that IBM Concert 1.0 through 3.0.0 allows web page cache to be stored locally, which can be read by another user on the system. The CVSS score is 4 (Medium).

Sources and references

Verified primary and authoritative sources

  • CVE-2026-4405 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-4405

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

  • CVE-2026-4405 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-4405

    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.