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TI-2026-77982 Aliases CVE-2026-101679GHSA-pwv9-2jx3-8439

Denial of service in Oracle MySQL Server and MySQL Cluster client programs

Priority LOW 39CWE-284Published · Updated

Key facts

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

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

Summary

Tracked as CVE-2026-101679, the client programs component of Oracle MySQL Server and MySQL Cluster has an improper access control flaw (CWE-284). An unauthenticated attacker with network access via multiple protocols can cause a hang or repeatable crash, a complete denial of service, with CVSS 3.1 base score 7.5 (HIGH) affecting availability only. Affected are MySQL Server 8.4.0-8.4.12, 9.7.0-9.7.3 and 26.7.0-26.7.1, and MySQL Cluster 8.0.0-8.0.49, 8.4.0-8.4.12, 9.7.0-9.7.3 and 26.7.0-26.7.1.

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

Description from the CNA

Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Client programs). Supported versions that are affected are MySQL Server: 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1; MySQL Cluster: 8.0.0-8.0.49, 8.4.0-8.4.12, 9.7.0-9.7.3 and 26.7.0-26.7.1. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise MySQL Server, MySQL Cluster. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server, MySQL Cluster. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/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 0.00474 41st 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
Yes
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
OracleMySQL Server8.4.0-8.4.12; 9.7.0-9.7.3; 26.7.0-26.7.1—No fix listedCNA
OracleMySQL Cluster8.0.0-8.0.49; 8.4.0-8.4.12; 9.7.0-9.7.3; 26.7.0-26.7.1—No fix listedCNA
  • MySQL Server VendorOracle Affected 8.4.0-8.4.12; 9.7.0-9.7.3; 26.7.0-26.7.1 Fixed in — No fix listed CNA
  • MySQL Cluster VendorOracle Affected 8.0.0-8.0.49; 8.4.0-8.4.12; 9.7.0-9.7.3; 26.7.0-26.7.1 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for the affected ranges. Red Hat rates the issue Important and reports no fix available for Red Hat Enterprise Linux 9 and 10.

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 MySQL Cluster, MySQL Server — oracle.com/security-alerts/cpuoct2026.html

    81 records Highest priority Priority MEDIUM 1 MEDIUM, 80 LOW

    Other records, highest priority first

    • TI-2026-78081 Improper access control in MySQL Server Group Replication GCSPriority MEDIUM 40
    • TI-2026-78070 Improper access control in Oracle MySQL Server and MySQL ClusterPriority LOW 38
    • TI-2026-78072 Improper access control in Oracle MySQL Server and MySQL ClusterPriority LOW 37
    Show all 81 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Hardened Images

Timeline

  1. 2026-10-21 Threatist record created from CVE-2026-101679
  2. 2026-10-21 Alias added: GHSA-pwv9-2jx3-8439
  3. 2026-10-21 Weakness changed · CISA ADP
  4. 2026-10-21 CISA SSVC decision points changed
  5. 2026-10-21 Priority changed: MEDIUM → LOW
  6. 2026-10-22 CISA SSVC decision points changed
  7. 2026-10-23 Affected versions changed · Red Hat
  8. 2026-10-23 CVSS score added · Red Hat
  9. 2026-10-24 Affected versions changed · Red Hat

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