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PatchSiren cyber security CVE debrief

CVE-2026-91345 Oracle Corporation CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-10-20T21:25:26.576Z and has not been modified since then. This high-severity vulnerability in Oracle Outside In Technology allows unauthenticated attackers to cause a hang or crash. Defenders should prioritize verifying exposure and assessing network access controls. The vulnerability affects version 8.5.8 and has a CVSS score of 7.5. The CVE record and Oracle advisory provide details on the vulnerability.

Vendor
Oracle Corporation
Product
Oracle Outside In Technology
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-20
Original CVE updated
2026-10-22
Advisory published
2026-10-20
Advisory updated
2026-10-22

Who should care

Defenders responsible for Oracle Outside In Technology deployments should verify exposure and assess network access controls. This includes operators, platform administrators, vulnerability management teams, and security teams. The vulnerability affects version 8.5.8 and has a CVSS score of 7.5, making it a high-severity vulnerability that requires immediate attention.

Why it matters

CVE-2026-91345 is a high-severity vulnerability in Oracle Outside In Technology that allows unauthenticated attackers to cause a hang or crash. Defenders should prioritize verifying exposure and assessing network access controls.

  • Potential for denial of service (DoS) attacks.
  • Need to verify exposure of Oracle Outside In Technology version 8.5.8.
  • Requirement to assess and restrict network access to Oracle Outside In Technology.

Technical summary

CVE-2026-91345 is a vulnerability in Oracle Outside In Technology version 8.5.8, allowing unauthenticated attackers with network access via HTTP to cause a hang or crash. The vulnerability has a CVSS score of 7.5 and is considered high-severity. Defenders should prioritize verifying exposure of Oracle Outside In Technology version 8.5.8 and assessing network access controls. The CVE record and Oracle advisory provide details on the vulnerability and recommended actions. The vulnerability affects Oracle Outside In Technology deployments, and defenders should review and apply Oracle's security advisory for CVE-2026-91345.

Defensive priority

Defenders should prioritize verifying exposure of Oracle Outside In Technology version 8.5.8 and assessing network access controls.

Recommended defensive actions

  • Verify exposure of Oracle Outside In Technology version 8.5.8 in your environment.
  • Assess and restrict network access to Oracle Outside In Technology.
  • Review and apply Oracle's security advisory for CVE-2026-91345.
  • 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.
  • Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
  • technicalSummary

Evidence notes

The CVE record and Oracle advisory provide details on the vulnerability in Oracle Outside In Technology version 8.5.8. The vulnerability allows unauthenticated attackers with network access via HTTP to cause a hang or crash. Defenders should verify exposure and assess network access controls. The CVE record was published on 2026-10-20T21:25:26.576Z and has not been modified since then. The Oracle advisory provides additional information on the vulnerability and recommended actions.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-91345 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-91345

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

  • CVE-2026-91345 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-91345

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

Supplemental references

  • CVE-2026-91345

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/91xxx/CVE-2026-91345.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://www.oracle.com/security-alerts/cpuoct2026.html

    Supplemental source - vendor-advisory

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.