CVE-2026-91473 Oracle Corporation CVE debrief

Who should care

Defenders managing Oracle HTTP Server 12.2.1.4.0 should assess exposure and prioritize remediation due to potential takeover of Oracle HTTP Server. This includes verifying Oracle HTTP Server version and exposure, applying remediation from Oracle, and monitoring for potential takeover attempts.

Why it matters

Defenders should prioritize verifying exposure and applying remediation for Oracle HTTP Server 12.2.1.4.0 due to a high-severity vulnerability allowing potential takeover.

• Potential takeover of Oracle HTTP Server
• Compromise of confidentiality, integrity, and availability

Technical summary

Easily exploitable vulnerability in Oracle HTTP Server (component: Web Listener) allows low-privileged attacker with logon to compromise Oracle HTTP Server. Successful attacks can result in takeover. The vulnerability has a CVSS score of 7.8, indicating high severity. The supported version that is affected is 12.2.1.4.0. CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). Defenders managing Oracle HTTP Server 12.2.1.4.0 should assess exposure and prioritize remediation due to potential takeover of Oracle HTTP Server.

Defensive priority

Defenders should prioritize verifying exposure and applying remediation, focusing on systems with Oracle HTTP Server 12.2.1.4.0.

Recommended defensive actions

• Verify Oracle HTTP Server version and exposure
• Apply remediation from Oracle
• Monitor for potential takeover attempts
• Review compensating controls for exposed systems while remediation is scheduled and verified
• 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

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but vendor remediation and affected scope require verification. Oracle HTTP Server 12.2.1.4.0 is the supported version that is affected. The vulnerability allows low-privileged attackers with logon to the infrastructure where Oracle HTTP Server executes to compromise Oracle HTTP Server. Successful attacks of this vulnerability can result in takeover of Oracle HTTP Server. The CVSS 3.1 Base Score is 7.8 (Confidentiality, Integrity and Availability impacts).

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.