Oracle Identity Manager Connector: Authentication bypass in LDAP Gateway
Summary
The LDAP Gateway component of Oracle Identity Manager Connector (versions 12.2.1.4.0 and 14.1.2.1.0) contains authentication weaknesses (CWE-287, CWE-306). An unauthenticated attacker with network access to the LDAP interface can compromise the connector, with a possible takeover of the product. Oracle rates the flaw CVSS 9.8 (Critical). Exploitation requires no user interaction and no credentials.
Affected
- Oracle Identity Manager Connector 12.2.1.4.0
- Oracle Identity Manager Connector 14.1.2.1.0
Fixed in
Unknown. Check the Oracle October 2026 Critical Patch Update advisory for the patch for your version.
Workaround
- No vendor-confirmed workaround known.
- Restrict access to the LDAP Gateway to trusted hosts using firewall rules or network segmentation (interim measure, not confirmed by Oracle for this CVE).
Exploitation
- Exploited in the wild: No evidence found. Not listed in the CISA KEV catalog.
- CISA SSVC: exploitation none, automatable yes, technical impact total.
- Public proof of concept: Not found.
Our recommendation
- Confirm whether Oracle Identity Manager Connector 12.2.1.4.0 or 14.1.2.1.0 is in use and where the LDAP Gateway runs.
- Restrict LDAP Gateway access to trusted hosts now. Do not expose LDAP ports to the internet.
- Apply the October 2026 Oracle Critical Patch Update fix for your version and verify it afterwards.
- Monitor for KEV listing or public exploit code and review the Oracle advisory.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Oracle Security Alert: October 2026 Critical Patch Update www.oracle.com
- OpenCVE: CVE-2026-91491 app.opencve.io
- Strix: CVE-2026-91491 www.strix.ai
- Vulners: CVE-2026-91491 vulners.com
- Brandefense: Oracle October 2026 CPU brandefense.io
- Tenable: Oracle October 2026 CPU connect.tenable.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 30 Oct 2026, 17:11.
Original description (NVD)
Vulnerability in the Oracle Identity Manager Connector product of Oracle Fusion Middleware (component: LDAP Gateway). Supported versions that are affected are 12.2.1.4.0 and 14.1.2.1.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via LDAP to compromise Oracle Identity Manager Connector. Successful attacks of this vulnerability can result in takeover of Oracle Identity Manager Connector. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/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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