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TI-2026-77534 Aliases CVE-2026-91484GHSA-gc2w-gh9m-xw58

Improper access control in Oracle Java SE Java plugin

Priority LOW 34CWE-284Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-284.

Summary

Oracle Java SE 8u503 and 8u503-perf in the Java plugin are affected. An improper access control weakness (CWE-284) affects Java deployments that run untrusted code in sandboxed applets or Java Web Start applications. A low privileged attacker with logon to the infrastructure where Java SE runs can create, delete or modify critical data, and successful attacks may also impact other products, although exploitation is difficult.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00108 1st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OracleOracle Java SE8u503; 8u503-perf—No fix listedCNA
  • Oracle Java SE VendorOracle Affected 8u503; 8u503-perf Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Oracle Java SE.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Oracle Java SE — oracle.com/security-alerts/cpuoct2026.html

    51 records Highest priority Priority LOW 51 LOW

    Other records, highest priority first

    • TI-2026-77455 Improper access control in Oracle Java SE and GraalVMPriority LOW 35
    • TI-2026-77105 Improper access control in Oracle Java SE networking componentPriority LOW 35
    • TI-2026-77828 Improper access control in Oracle Java SEPriority LOW 34
    Show all 51 records → Advisory →

Timeline

  1. 2026-10-21 Threatist record created from CVE-2026-91484
  2. 2026-10-21 Alias added: GHSA-gc2w-gh9m-xw58
  3. 2026-10-22 Priority changed: MEDIUM → LOW
  4. 2026-10-24 Weakness changed · CISA ADP
  5. 2026-10-24 CISA SSVC decision points changed

References

Advisory 1

  • TI-2026-34425 Improper privilege management in Oracle Payments KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-27421 Missing authentication in Oracle PeopleSoft Enterprise PeopleTools KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-17661 Improper access control in Oracle HTTP Server, Oracle Weblogic Server Proxy Plug-in KEVCVSS 3.1CRITICAL 10.0
  • TI-2025-38252 Improper authentication in Oracle Concurrent Processing KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-38151 Missing authentication in Oracle Identity Manager KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-07142 Code injection in Spring Framework KEVCVSS 3.1CRITICAL 9.8
See all 14200 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences