TI-2026-77551 Aliases CVE-2026-91503 GHSA-523r-r9q7-vcr2

Improper access control in Oracle Database Server VPD component

LOW 37CWE-284Published 2026-10-20 · Updated 2026-10-24

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
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

Supported versions of Oracle Database Server from 19.3 through 19.32, from 21.3 through 21.23 and from 23.4.0 through 23.26.3 are affected. Improper access control (CWE-284) in the VPD component lets a low-privileged attacker with the Create Table privilege compromise VPD over the network through Oracle Net. A successful attack can create, delete or modify critical data and access all VPD-accessible data.

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

Description from the CNA

Vulnerability in the VPD component of Oracle Database Server. Supported versions that are affected are 19.3-19.32, 21.3-21.23 and 23.4.0-23.26.3. Easily exploitable vulnerability allows low privileged attacker having Create Table privilege with network access via Oracle Net to compromise VPD. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all VPD accessible data as well as unauthorized access to critical data or complete access to all VPD accessible data. CVSS 3.1 Base Score 8.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00248 16th 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

Vendor	Product	Affected versions	Fixed in	Status	Source
Oracle	Oracle Database Server	19.3 – 19.32; 21.3 – 21.23; 23.4.0 – 23.26.3	—	No fix listed	CNA

Oracle Database Server VendorOracle Affected 19.3 – 19.32; 21.3 – 21.23; 23.4.0 – 23.26.3 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Oracle Database Server.

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 · 2026-10-20
Oracle Database Server — oracle.com/security-alerts/cpuoct2026.html
7 records Highest priority Priority MEDIUM 1 MEDIUM, 6 LOW
Other records, highest priority first
- TI-2026-77548 Privilege management flaw in Oracle Database Server RDBMS componentPriority MEDIUM 40
- TI-2026-77592 Access control flaw in Oracle Database Server RDBMS exposes dataPriority LOW 34
- TI-2026-77825 Oracle Database Server RDBMS improper access control exposes dataPriority LOW 29
Show all 7 records → Advisory →

Timeline

2026-10-21 Threatist record created from CVE-2026-91503
2026-10-21 Alias added: GHSA-523r-r9q7-vcr2
2026-10-22 Priority changed: MEDIUM → LOW
2026-10-24 Weakness changed · CISA ADP
2026-10-24 CISA SSVC decision points changed

References

Advisory 1

Oracle Advisory

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