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CVE-2026-91491: Vulnerability in the Oracle Identity Manager Connector product of Oracle Fusion Middleware (component: LDAP Ga

46
This month
CRITICAL 9.8REMOTEDOWNGRADE

CVE-2026-91491 is a critical-severity flaw (CVSS 9.8) affecting identity manager connector. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 Sc

Why this priority

  • Critical severity
  • Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score9.8 (Critical)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance0.3% (top 74%)
CISA exploited listNo
WeaknessCWE-287, CWE-306
Published2026-10-20
Last modified2026-10-27
Publisher (CNA): Oracle · Vendor: oracle

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Last updated 2026-10-27 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

oracle identity manager connector DOWNGRADE
Affected: 12.2.1.4.0 · 14.1.2.1.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 12.2.1.4.0
1. Check installed version
apt-cache policy identity-manager-connector || rpm -q identity-manager-connector || identity-manager-connector --version
2. No fixed release: DOWNGRADE to a release before 12.2.1.4.0 (Debian / Ubuntu)
apt-cache madison identity-manager-connector sudo apt install identity-manager-connector=<VERSION_BEFORE_12.2.1.4.0> sudo apt-mark hold identity-manager-connector
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list identity-manager-connector sudo dnf downgrade identity-manager-connector-<VERSION_BEFORE_12.2.1.4.0> sudo dnf versionlock add identity-manager-connector
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-91491?

identity manager connector: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-91491 being exploited?

CVE-2026-91491 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-91491 affect?

CVE-2026-91491 affects identity manager connector. Severity is critical (CVSS 9.8). 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 unauthentica

How urgent is CVE-2026-91491?

Priority 46/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

References

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