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CVE-2026-3366 IBM CVE debrief

IBM InfoSphere Optim Test Data Fabrication versions 1.0.0 through 1.0.2.7 contain a path traversal vulnerability (CWE-22) that could allow remote attackers to view arbitrary files on the system. The vulnerability stems from insufficient input validation on URL requests containing directory traversal sequences (/../). With a CVSS 3.1 score of 7.5 (HIGH severity), this vulnerability is network-exploitable without authentication, requiring only low attack complexity. The confidentiality impact is rated HIGH while integrity and availability impacts are none. IBM has published security guidance addressing this issue. Organizations should apply available patches from IBM and implement input validation controls to mitigate directory traversal attempts.

Vendor
IBM
Product
InfoSphere Optim Test Data Fabrication
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-27
Original CVE updated
2026-06-02
Advisory published
2026-05-27
Advisory updated
2026-06-02

Who should care

Organizations running IBM InfoSphere Optim Test Data Fabrication in production environments, particularly those with externally accessible deployments. Security teams responsible for data protection and application security in enterprises using IBM data management solutions.

Technical summary

The vulnerability exists in IBM InfoSphere Optim Test Data Fabrication versions 1.0.0, 1.0.0.1, 1.0.0.2, 1.0.2, 1.0.2.2, 1.0.2.3, 1.0.2.4, 1.0.2.5, 1.0.2.6, and 1.0.2.7. Remote attackers can exploit insufficient path validation by sending crafted URL requests containing dot-dot-slash (/../) sequences to traverse the file system and access arbitrary files. The attack requires no authentication and no user interaction, making it trivially exploitable over the network.

Defensive priority

HIGH

Recommended defensive actions

  • Apply security patches from IBM for affected InfoSphere Optim Test Data Fabrication versions
  • Implement strict input validation to sanitize URL parameters and reject path traversal sequences
  • Configure web application firewalls with rules to detect and block directory traversal attempts
  • Review file system permissions to limit exposure of sensitive files
  • Monitor access logs for anomalous requests containing encoded or obfuscated traversal patterns

Evidence notes

Vulnerability confirmed via IBM PSIRT reference. CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. CWE-22 (Improper Limitation of a Pathname to a Restricted Directory) identified as primary weakness.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-3366 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-3366

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

  • CVE-2026-3366 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-3366

    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.