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TI-2026-77529 Aliases CVE-2026-91479GHSA-mrvr-7hxf-gwhg

Denial of service in Oracle Database Server RDBMS component

Priority LOW 28CWE-400Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-400.

Summary

Oracle Database Server versions 23.4.0 through 23.26.3 are affected by a flaw in the RDBMS component. The flaw is uncontrolled resource consumption (CWE-400), which lets an unauthenticated attacker with access to the physical communication segment attached to the hardware running RDBMS cause a hang or repeatable crash of the database. The impact is limited to availability.

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

Description from the CNA

Vulnerability in the RDBMS component of Oracle Database Server. Supported versions that are affected are 23.4.0-23.26.3. Easily exploitable vulnerability allows unauthenticated attacker with access to the physical communication segment attached to the hardware where the RDBMS executes to compromise RDBMS. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of RDBMS. CVSS 3.1 Base Score 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00235 14th 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
Partial

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 Database Server23.4.0 – 23.26.3—No fix listedCNA
  • Oracle Database Server VendorOracle Affected 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 ·

    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-2026-77551 Improper access control in Oracle Database Server VPD componentPriority LOW 37
    • TI-2026-77592 Access control flaw in Oracle Database Server RDBMS exposes dataPriority LOW 34
    Show all 7 records → Advisory →

Timeline

  1. 2026-10-21 Threatist record created from CVE-2026-91479
  2. 2026-10-21 Alias added: GHSA-mrvr-7hxf-gwhg
  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