TI-2026-17636 Aliases CVE-2026-21936 GHSA-p9xq-rj46-p3r9

Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB).

LOW 23Published 2026-01-20 · Updated 2026-01-21

Key facts

Attack vector: Network
Privileges required: High
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB). Supported versions that are affected are 8.0.0-8.0.44, 8.4.0-8.4.7 and 9.0.0-9.5.0. Easily exploitable vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00401 34th percentileScored 2026-11-07

Fix Fixed Red Hat: 5 advisories

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

Vendor	Product	Affected versions	Fixed in	Status	Source
Oracle	MySQL Cluster	7.6.0 – 7.6.36; 8.0.0 – 8.0.44; 8.4.0 – 8.4.7; 9.0.0 – 9.5.0	—	No fix listed	CNA
Oracle	MySQL Server	8.0.0 – 8.0.44; 8.4.0 – 8.4.7; 9.0.0 – 9.5.0	—	No fix listed	CNA

MySQL Cluster VendorOracle Affected 7.6.0 – 7.6.36; 8.0.0 – 8.0.44; 8.4.0 – 8.4.7; 9.0.0 – 9.5.0 Fixed in — No fix listed CNA
MySQL Server VendorOracle Affected 8.0.0 – 8.0.44; 8.4.0 – 8.4.7; 9.0.0 – 9.5.0 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:oracle:mysql_cluster::::::::	7.6.0 – 7.6.36; 8.0.0 – 8.0.44; 8.4.0 – 8.4.7; 9.0.0 – 9.5.0	Vulnerable	Oracle
cpe:2.3:a:oracle:mysql_server::::::::	8.0.0 – 8.0.44; 8.4.0 – 8.4.7; 9.0.0 – 9.5.0	Vulnerable	Oracle

cpe:2.3:a:oracle:mysql_cluster:*:*:*:*:*:*:*:* Versions 7.6.0 – 7.6.36; 8.0.0 – 8.0.44; 8.4.0 – 8.4.7; 9.0.0 – 9.5.0 Vulnerable ·Oracle
cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:* Versions 8.0.0 – 8.0.44; 8.4.0 – 8.4.7; 9.0.0 – 9.5.0 Vulnerable ·Oracle

Remediation

Red Hat 5 advisories

RHSA-2026:6391 Released 2026-04-01 · Red Hat rating Moderate
mysql:8.4 security update
- Red Hat Enterprise Linux AppStream (v. 8) mecab-0.996-2.module+el8.10.0+23550+bd321b9a.aarch64::mysql:8.4, mecab-0.996-2.module+el8.10.0+23550+bd321b9a.ppc64le::mysql:8.4, mecab-0.996-2.module+el8.10.0+23550+bd321b9a.s390x::mysql:8.4 +39
RHSA-2026:5640 Released 2026-03-24 · Red Hat rating Moderate
mysql:8.4 security update
- Red Hat Enterprise Linux AppStream (v. 9) mecab-0.996-3.module+el9.7.0+24088+36dcab8d.4.aarch64::mysql:8.4, mecab-0.996-3.module+el9.7.0+24088+36dcab8d.4.ppc64le::mysql:8.4, mecab-0.996-3.module+el9.7.0+24088+36dcab8d.4.s390x::mysql:8.4 +45
RHSA-2026:5580 Released 2026-03-24 · Red Hat rating Moderate
mysql:8.0 security update
- Red Hat Enterprise Linux AppStream (v. 8) mecab-0.996-2.module+el8.10.0+22857+7f331edd.aarch64::mysql:8.0, mecab-0.996-2.module+el8.10.0+22857+7f331edd.ppc64le::mysql:8.0, mecab-0.996-2.module+el8.10.0+22857+7f331edd.s390x::mysql:8.0 +44

Show 2 more Red Hat advisories

RHSA-2026:4828 Released 2026-03-17 · Red Hat rating Moderate
mysql security update
- Red Hat Enterprise Linux AppStream (v. 9) mysql-8.0.45-1.el9_7, mysql-common-8.0.45-1.el9_7, mysql-errmsg-8.0.45-1.el9_7 +2
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) mysql-devel-8.0.45-1.el9_7, mysql-test-8.0.45-1.el9_7
RHSA-2026:4162 Released 2026-03-10 · Red Hat rating Moderate
mysql8.4 security update
- Red Hat Enterprise Linux AppStream (v. 10) mysql8.4-8.4.8-1.el10_1, mysql8.4-common-8.4.8-1.el10_1, mysql8.4-errmsg-8.4.8-1.el10_1 +2
- Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) mysql8.4-devel-8.4.8-1.el10_1, mysql8.4-test-8.4.8-1.el10_1, mysql8.4-test-data-8.4.8-1.el10_1

Fixed in the same release

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

Advisory · 2026-01-20
Oracle MySQL Server — oracle.com/security-alerts/cpujan2026.html
11 records Highest priority Priority LOW 11 LOW
Other records, highest priority first
- TI-2026-17667 Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer).Priority LOW 29
- TI-2026-17650 Uncontrolled resource consumption in Oracle MySQL ServerPriority LOW 29
- TI-2026-17649 Uncontrolled resource consumption in Oracle MySQL ServerPriority LOW 29
Show all 11 records → Advisory →

Vendor assessments

Red Hat

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

Product	Status	Plan or fix
Red Hat Enterprise Linux AppStream (v. 10)	Fixed	RHSA-2026:4162
Red Hat Enterprise Linux AppStream (v. 8)	Fixed	RHSA-2026:5580, RHSA-2026:6391
Red Hat Enterprise Linux AppStream (v. 9)	Fixed	RHSA-2026:4828, RHSA-2026:5640
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)	Fixed	RHSA-2026:4162
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)	Fixed	RHSA-2026:4828

Not affected: 1 product

Red Hat Enterprise Linux 6

Timeline

2026-10-02 Threatist record created from CVE-2026-21936
2026-10-03 Alias added: GHSA-p9xq-rj46-p3r9

References

Advisory 1

Oracle Advisory

TI-2021-14316 Out-of-bounds write in Oracle MySQL Cluster CVSS 3.1MEDIUM 6.3
TI-2021-05744 Uncontrolled resource consumption in NodeJS Node CVSS 3.1HIGH 7.5
TI-2022-05875 Vulnerability in the MySQL Cluster product of Oracle MySQL (component: Cluster: General). CVSS 3.1MEDIUM 6.3
TI-2021-05792 Improper input validation in NodeJS Node CVSS 3.1CRITICAL 9.8
TI-2020-06694 Uncontrolled resource consumption in NodeJS Node CVSS 3.1HIGH 7.5
TI-2021-14324 Improper array index validation in Oracle MySQL Cluster CVSS 3.1MEDIUM 6.3

See all 122 →

Sources

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