CVE-2026-34267: 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. in Oracle Corporation MySQL Server
Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.0-8.0.45. 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).
AI Analysis
Technical Summary
This vulnerability in Oracle MySQL Server (component: Server: Optimizer) affects versions 8.0.0 to 8.0.45. It permits a high privileged attacker with network access to cause a hang or repeated crash of the MySQL Server, resulting in a complete denial of service. The CVSS 3.1 base score is 4.9, reflecting an availability impact only. Oracle's April 2026 Critical Patch Update addresses this and other vulnerabilities, providing patches for affected MySQL Server versions. No known exploits in the wild have been reported as of the advisory date.
Potential Impact
Successful exploitation leads to denial of service by causing the MySQL Server to hang or crash repeatedly. There is no impact on confidentiality or integrity. The vulnerability requires high privileges and network access via multiple protocols. No known active exploitation has been reported.
Mitigation Recommendations
Oracle has released patches for this vulnerability as part of the April 2026 Critical Patch Update. Users running affected MySQL Server versions (8.0.0 to 8.0.45) should apply the update promptly. Oracle strongly recommends staying on actively supported versions and applying Critical Patch Updates without delay. Patch status is confirmed by the vendor advisory.
CVE-2026-34267: 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. in Oracle Corporation MySQL Server
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. 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).
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Oracle MySQL Server (component: Server: Optimizer) affects versions 8.0.0 to 8.0.45. It permits a high privileged attacker with network access to cause a hang or repeated crash of the MySQL Server, resulting in a complete denial of service. The CVSS 3.1 base score is 4.9, reflecting an availability impact only. Oracle's April 2026 Critical Patch Update addresses this and other vulnerabilities, providing patches for affected MySQL Server versions. No known exploits in the wild have been reported as of the advisory date.
Potential Impact
Successful exploitation leads to denial of service by causing the MySQL Server to hang or crash repeatedly. There is no impact on confidentiality or integrity. The vulnerability requires high privileges and network access via multiple protocols. No known active exploitation has been reported.
Mitigation Recommendations
Oracle has released patches for this vulnerability as part of the April 2026 Critical Patch Update. Users running affected MySQL Server versions (8.0.0 to 8.0.45) should apply the update promptly. Oracle strongly recommends staying on actively supported versions and applying Critical Patch Updates without delay. Patch status is confirmed by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- oracle
- Date Reserved
- 2026-03-26T19:48:45.674Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.oracle.com/security-alerts/cpuapr2026.html","vendor":"Oracle"}]
Threat ID: 69e7e5a019fe3cd2cdf9f73c
Added to database: 4/21/2026, 9:01:20 PM
Last enriched: 4/21/2026, 10:16:46 PM
Last updated: 4/22/2026, 7:15:27 AM
Views: 4
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