VDB

CVE-2026-21998

CVE-2026-21998 PUBLISHED CVSS 4.900000095367432 MEDIUM

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).

EPSS 0.05% · 14.9th percentile

Risk Scores

CVSS 3.1
4.900000095367432
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
EPSS Score
0.05%
14.9th percentile

Affected Products

VendorProductVersions
oraclemysql_server8.4.0, 8.0.0, 9.0.0
Oracle CorporationMySQL Server8.4.0, 8.0.0, 9.0.0

Timeline

  • Apr 21, 2026 CVE Published
  • Apr 22, 2026 Security Advisory
  • Apr 22, 2026 CVE Updated
  • May 18, 2026 EPSS Score
  • May 19, 2026 EPSS Score
  • May 20, 2026 EPSS Score
  • May 21, 2026 EPSS Score
  • May 22, 2026 EPSS Score
  • May 23, 2026 EPSS Score
  • May 24, 2026 EPSS Score
  • May 25, 2026 EPSS Score
  • May 26, 2026 EPSS Score

References

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