CVE-2026-34308: Easily exploitable vulnerability allows low 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
CVE-2026-34308 is a vulnerability in Oracle MySQL Server affecting versions 8. 0. 0 to 8. 0. 45, 8. 4. 0 to 8. 4. 8, and 9. 0.
AI Analysis
Technical Summary
CVE-2026-34308 is a denial-of-service vulnerability in the JSON component of Oracle MySQL Server. It affects multiple supported versions including 8.0.0 through 8.0.45, 8.4.0 through 8.4.8, and 9.0.0 through 9.6.0. The vulnerability allows a low privileged attacker with network access to cause the MySQL Server to hang or crash repeatedly, resulting in a complete denial of service. The CVSS 3.1 base score is 6.5, reflecting a medium severity with an impact on availability only. The vulnerability is categorized under CWE-400 (Uncontrolled Resource Consumption). Oracle's April 2026 Critical Patch Update advisory references this and many other vulnerabilities but does not explicitly confirm a dedicated patch for this specific issue. Customers are urged to apply the latest Critical Patch Update to address this and other vulnerabilities.
Potential Impact
Successful exploitation of this vulnerability allows an attacker with low privileges and network access to cause MySQL Server to hang or crash repeatedly, resulting in a complete denial of service. There is no impact on confidentiality or integrity. No known exploits in the wild have been reported as of the advisory date.
Mitigation Recommendations
Oracle's April 2026 Critical Patch Update advisory includes security patches addressing multiple vulnerabilities, including those affecting MySQL Server. Although a specific patch for CVE-2026-34308 is not explicitly confirmed in the advisory, Oracle strongly recommends applying the April 2026 Critical Patch Update promptly to mitigate this and other vulnerabilities. Customers should ensure they are running actively supported versions and keep their MySQL Server installations up to date with Oracle's security patches. Patch status is not yet confirmed explicitly for this vulnerability—check Oracle's advisory for the latest remediation guidance.
CVE-2026-34308: Easily exploitable vulnerability allows low 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
CVE-2026-34308 is a vulnerability in Oracle MySQL Server affecting versions 8. 0. 0 to 8. 0. 45, 8. 4. 0 to 8. 4. 8, and 9. 0.
CVSS v3.1
Score 6.5medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-34308 is a denial-of-service vulnerability in the JSON component of Oracle MySQL Server. It affects multiple supported versions including 8.0.0 through 8.0.45, 8.4.0 through 8.4.8, and 9.0.0 through 9.6.0. The vulnerability allows a low privileged attacker with network access to cause the MySQL Server to hang or crash repeatedly, resulting in a complete denial of service. The CVSS 3.1 base score is 6.5, reflecting a medium severity with an impact on availability only. The vulnerability is categorized under CWE-400 (Uncontrolled Resource Consumption). Oracle's April 2026 Critical Patch Update advisory references this and many other vulnerabilities but does not explicitly confirm a dedicated patch for this specific issue. Customers are urged to apply the latest Critical Patch Update to address this and other vulnerabilities.
Potential Impact
Successful exploitation of this vulnerability allows an attacker with low privileges and network access to cause MySQL Server to hang or crash repeatedly, resulting in a complete denial of service. There is no impact on confidentiality or integrity. No known exploits in the wild have been reported as of the advisory date.
Mitigation Recommendations
Oracle's April 2026 Critical Patch Update advisory includes security patches addressing multiple vulnerabilities, including those affecting MySQL Server. Although a specific patch for CVE-2026-34308 is not explicitly confirmed in the advisory, Oracle strongly recommends applying the April 2026 Critical Patch Update promptly to mitigate this and other vulnerabilities. Customers should ensure they are running actively supported versions and keep their MySQL Server installations up to date with Oracle's security patches. Patch status is not yet confirmed explicitly for this vulnerability—check Oracle's advisory for the latest remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- oracle
- Date Reserved
- 2026-03-26T19:48:45.679Z
- 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: 69e7e5a819fe3cd2cdf9f9b6
Added to database: 4/21/2026, 9:01:28 PM
Last enriched: 4/29/2026, 11:24:21 AM
Last updated: 6/6/2026, 12:57:48 AM
Views: 104
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