CVE-2026-87354 Oracle Corporation CVE debrief

Who should care

Defenders responsible for Oracle TimesTen In-Memory Database deployments, especially those using versions 22.1-22.1.40.0 and 26.1-26.1.1.2.0, should assess their exposure and prioritize verifying the impact on their systems.

Why it matters

CVE-2026-87354 is a medium-severity vulnerability in Oracle TimesTen In-Memory Database that allows low-privileged attackers to access sensitive data. Defenders should prioritize verifying exposure, assessing impact, and implementing necessary patches or mitigations.

• Verification of exposure in Oracle TimesTen In-Memory Database versions 22.1-22.1.40.0 and 26.1-26.1.1.2.0
• Assessment of potential unauthorized read access to a subset of database data
• Implementation of necessary patches or mitigations as recommended by Oracle

Technical summary

The vulnerability in Oracle TimesTen In-Memory Database (component: Kubernetes Operator) allows a low-privileged attacker with network access via HTTPS to compromise the database. Successful attacks can result in unauthorized read access to a subset of Oracle TimesTen In-Memory Database accessible data. The CVSS 3.1 Base Score is 4.3 (Confidentiality impacts). This vulnerability affects versions 22.1-22.1.40.0 and 26.1-26.1.1.2.0, and defenders should focus on verifying exposure and assessing potential impact on their systems.

Defensive priority

Defenders should prioritize verifying exposure and assessing the impact on their systems, especially those using Oracle TimesTen In-Memory Database versions 22.1-22.1.40.0 and 26.1-26.1.1.2.0.

Recommended defensive actions

• Verify Oracle TimesTen In-Memory Database versions 22.1-22.1.40.0 and 26.1-26.1.1.2.0 for exposure
• Assess the impact of potential unauthorized read access to a subset of database data
• Review and implement necessary patches or mitigations as recommended by Oracle
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its CVSS score of 4.3 and vector (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N). Oracle's security alert page (CPUOct2026) is also referenced for further information.

Sources and 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.