Oracle HTTP Server: Improper privilege management allows takeover of the server
Summary
CVE-2026-91473 affects Oracle HTTP Server 12.2.1.4.0 in the Web Listener component. A low-privileged attacker with logon to the host where Oracle HTTP Server runs can compromise it, with a successful attack resulting in takeover of the server. The attack is local, has low complexity and needs no user interaction, so it is not an internet-facing unauthenticated flaw.
Affected
- Oracle HTTP Server 12.2.1.4.0 (component Web Listener)
- Other branches: Unknown.
Fixed in
Unknown. Check the Oracle Critical Patch Update October 2026 (OHS section) and Oracle's Patch Availability Document for 12.2.1.4.0.
Workaround
Unknown. No vendor-documented mitigation found.
- Until patched, restrict local logon to the host and tighten account management (general measure, not vendor-sourced).
Exploitation
- Not listed in CISA KEV.
- CISA SSVC: Exploitation none, automatable no, technical impact total.
- No public exploit found; VulDB states there is no available exploit.
- Vendor exploitation data: Unknown.
Our recommendation
- Check whether Oracle HTTP Server 12.2.1.4.0 is in use, for example with Oracle E-Business Suite, WebLogic, or Forms/Reports.
- If it is in use, apply the Oracle October 2026 CPU patch for 12.2.1.4.0.
- Until patched, restrict local logon on the host and review accounts with shell or logon rights.
- Monitor OHS and host logs for unusual activity.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Oracle Security Alert: Critical Patch Update October 2026 www.oracle.com
- OpenCVE record CVE-2026-91473 app.opencve.io
- VulDB entry 424233 vuldb.com
- Vulners mirror of Oracle CPU October 2026 vulners.com
- Oracle HTTP Server 12.2.1.4 documentation docs.oracle.com
- AppSolve Group: October 2026 patch updates (third-party commentary) appsolvegroup.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 1 Nov 2026, 23:13.
Original description (NVD)
Vulnerability in the Oracle HTTP Server product of Oracle Fusion Middleware (component: Web Listener). The supported version that is affected is 12.2.1.4.0. Easily exploitable vulnerability allows low privileged attacker 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. CVSS 3.1 Base Score 7.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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