CVE-2025-50091Network attack vector

Authenticated hang or crash via optimizer processing

Published Jul 15, 2025 · Updated Jul 16, 2025

Denial of service in Oracle MySQL Server's Optimizer allows remote authenticated users to hang or repeatedly crash servers via MySQL Protocol. Oracle has not published the optimizer operation or crafted input that triggers the failure. High-privileged MySQL accounts are required; affected releases are 8.0.0 through 8.0.42, 8.4.0 through 8.4.5, and 9.0.0 through 9.3.0.

CVSS severity4.9
Medium
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Oracle MySQL Server's Optimizer allows remote authenticated users to hang or repeatedly crash servers via MySQL Protocol. Oracle has not published the optimizer operation or crafted input that triggers the failure. High-privileged MySQL accounts are required; affected releases are 8.0.0 through 8.0.42, 8.4.0 through 8.4.5, and 9.0.0 through 9.3.0.

The record

CVE
CVE-2025-50091
Published
Jul 15, 2025
Updated
Jul 16, 2025
Vendor
Oracle Corporation
Product
MySQL Server
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jul 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 16, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=8.0.0 <=8.0.42
  2. Affected versionversion=8.4.0 <=8.4.5
  3. Affected versionversion=9.0.0 <=9.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Oracle Corporation · MySQL Serverversion=8.0.0 <=8.0.42; version=8.4.0 <=8.4.5; version=9.0.0 <=9.3.0

Published CVSS scores

4.9OracleCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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