Zero Day MonitorZDM
DashboardVulnerabilitiesTrendingZero-DaysNewsAbout
Login
ImpressumPrivacy Policy
Zero Day Monitor © 2026
3452 articles · 142284 vulns · 36/41 feeds (7d)
← Back to list
4.9
CVE-2026-21998EXPLOITEDPATCHED
oracle · mysql_server

CVE-2026-21998: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are a

Description

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.0-8.0.45, 8.4.0-8.4.8 and 9.0.0-9.6.0. 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).

Affected Products

VendorProductVersions
oraclemysql_server8.0.0, 8.4.0, 9.0.0, 8.0.45-2, 8.0.45-3

Also Affects

Downstream vendors/products affected by this vulnerability

VendorProductSourceConfidence
oraclemysqlcert_advisory90%

References

  • https://www.oracle.com/security-alerts/cpuapr2026.html(vendor-advisory)

Related News (6 articles)

Tier B
CERT-FR21h ago
Multiples vulnérabilités dans les produits VMware (11 mai 2026)
→ No new info (linked only)
Tier B
CERT-FR14d ago
Multiples vulnérabilités dans les produits Microsoft (27 avril 2026)
→ No new info (linked only)
Tier A
Microsoft MSRC18d ago
CVE-2026-21998
→ No new info (linked only)
Tier B
BSI Advisories19d ago
[NEU] [hoch] Oracle MySQL: Mehrere Schwachstellen
→ No new info (linked only)
Tier C
VulDB19d ago
CVE-2026-21998 | Oracle MySQL Server up to 8.0.45/8.4.8/9.6.0 Optimizer denial of service
→ No new info (linked only)
Tier B
CERT-FR19d ago
Multiples vulnérabilités dans Oracle MySQL (22 avril 2026)
→ No new info (linked only)
CVSS 3.14.9 MEDIUM
VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CISA KEV❌ No
Actively exploited✅ Yes
Patch available
https://www.oracle.com/security-alerts/cpuapr2026.html
PublishedApr 21, 2026
Last enriched14d agov3
Trending Score56
Source articles6
Independent4
Info Completeness9/14
Missing: epss, cwe, kev, iocs, mitre_attack

Community Vote

0
Login to vote
0 upvotes0 downvotes
No votes yet

Related CVEs (5)

MEDIUMCVE-2026-22009EXP
CVE-2026-22009: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are a
Trending: 56
MEDIUMCVE-2026-22015EXP
CVE-2026-22015: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Information Schema). Supported versions t
Trending: 56
MEDIUMCVE-2026-22005EXP
CVE-2026-22005: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are a
Trending: 56
LOWCVE-2026-22001EXP
CVE-2026-22001: Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Information Schema). Supported versions t
Trending: 55
MEDIUMCVE-2026-34304
CVE-2026-34304: Vulnerability in the MySQL Server product of Oracle MySQL (component: InnoDB). Supported versions that are affected are
Trending: 47

Pin to Dashboard

Verification

State: unverified
Confidence: 0%

Vulnerability Timeline

CVE Published
Apr 21, 2026
Discovered by ZDM
Apr 21, 2026
Updated: affectedVersions
Apr 22, 2026
Actively Exploited
Apr 22, 2026
Exploit Available
Apr 22, 2026
Patch Available
Apr 22, 2026
Updated: affectedVersions, exploitAvailable, activelyExploited
Apr 27, 2026

Version History

v3
Last enriched 14d ago
v3Tier B14d ago

Updated affected versions to include 8.0.45-2 and 8.0.45-3, marked exploit available and actively exploited as true, and set patch available to null.

affectedVersionsexploitAvailableactivelyExploited
via CERT-FR
v2Tier C19d ago

Updated affected versions to include 9.6.0 and corrected exploit availability to false.

affectedVersions
via VulDB
v119d ago

Initial creation