CVE-2026-91484

7.5

Vulnerability in Oracle Java SE (component: Java plugin)

CVSS: 7.5, high high CVSS v3.1
EPSS, next 30 days: n/a
Exploitation: No public evidence
Published: 20 Oct 2026yesterday

Description

Vulnerability in Oracle Java SE (component: Java plugin). Supported versions that are affected are Oracle Java SE: 8u503 and 8u503-perf. Difficult to exploit vulnerability allows low privileged attacker with logon to the infrastructure where Oracle Java SE executes to compromise Oracle Java SE. While the vulnerability is in Oracle Java SE, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Java SE accessible data as well as unauthorized access to critical data or complete access to all Oracle Java SE accessible data. Note: This vulnerability applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability does not apply to Java deployments, typically in servers, that load and run only trusted code (e.g., code installed by an administrator). CVSS 3.1 Base Score 7.5 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N).

Details

Vendor: Oracle Corporation
Product: Oracle Java SE
Weakness: n/a
Status: Received
Updated: 20 Oct 2026
Assigner: secalert_us@oracle.com

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

References 1

Advisories 1

oracle.com /security-alerts/cpuoct2026.html (opens in a new tab)

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Oracle Corporation CVEs

Every Oracle Corporation CVE we hold

Same vendor in what we hold, not a known link between the flaws.

CVE-2026-101420 Vulnerability in the PeopleSoft Enterprise PeopleTools product of Oracle PeopleSoft (component: SQR) 9.6, critical
CVE-2026-101446 Vulnerability in the Siebel CRM Cloud Applications product of Oracle Siebel CRM (component: Siebel Cloud Manager) 9.9, critical
CVE-2026-101484 Vulnerability in Oracle Secure Backup (component: Backup and Restore) 9.8, critical
CVE-2026-101499 Vulnerability in the Oracle WebCenter Sites product of Oracle Fusion Middleware (component: WebCenter Sites) 9.8, critical
CVE-2026-101501 Vulnerability in Oracle Trusted Answer Search (component: PLSQL package) 9.9, critical
CVE-2026-101503 Vulnerability in Oracle Trusted Answer Search (component: PLSQL package) 9.9, critical
CVE-2026-101521 Vulnerability in Oracle APEX (component: General) 9.8, critical
CVE-2026-101528 Vulnerability in the Oracle Enterprise Manager for Oracle Database product of Oracle Enterprise Manager (component: Data Guard Management) 9.9, critical

Beyond this page

Is CVE-2026-91484 in your network?

This page tells you how dangerous CVE-2026-91484 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.
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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 21 Oct 2026, not the live upstream state.