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
Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: JSON). 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 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. CVSS 3.1 Base Score 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
AI Analysis
Technical Summary
This vulnerability in the MySQL Server component related to JSON processing allows an attacker with low privileges and network access to cause a hang or repeated crash of the server, resulting in a complete denial of service. The affected versions span multiple major releases of MySQL Server. The CVSS 3.1 base score is 6.5, reflecting a medium severity with an impact on availability only. Oracle's April 2026 Critical Patch Update advisory addresses this vulnerability among 481 other security fixes. The advisory strongly recommends applying the update promptly to mitigate this risk.
Potential Impact
Successful exploitation results in unauthorized denial of service by causing the MySQL Server to hang or crash repeatedly. There is no impact on confidentiality or integrity. The vulnerability can be exploited remotely by an attacker with low privileges and network access via multiple protocols, potentially disrupting database availability.
Mitigation Recommendations
Oracle has released patches for this vulnerability as part of the April 2026 Critical Patch Update. Customers should apply the April 2026 CPU promptly to remediate this issue. Oracle strongly recommends staying on actively-supported versions and applying security patches without delay. Patch status is confirmed as available via the Oracle advisory: https://www.oracle.com/security-alerts/cpuapr2026.html
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
Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: JSON). 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 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. CVSS 3.1 Base Score 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in the MySQL Server component related to JSON processing allows an attacker with low privileges and network access to cause a hang or repeated crash of the server, resulting in a complete denial of service. The affected versions span multiple major releases of MySQL Server. The CVSS 3.1 base score is 6.5, reflecting a medium severity with an impact on availability only. Oracle's April 2026 Critical Patch Update advisory addresses this vulnerability among 481 other security fixes. The advisory strongly recommends applying the update promptly to mitigate this risk.
Potential Impact
Successful exploitation results in unauthorized denial of service by causing the MySQL Server to hang or crash repeatedly. There is no impact on confidentiality or integrity. The vulnerability can be exploited remotely by an attacker with low privileges and network access via multiple protocols, potentially disrupting database availability.
Mitigation Recommendations
Oracle has released patches for this vulnerability as part of the April 2026 Critical Patch Update. Customers should apply the April 2026 CPU promptly to remediate this issue. Oracle strongly recommends staying on actively-supported versions and applying security patches without delay. Patch status is confirmed as available via the Oracle advisory: https://www.oracle.com/security-alerts/cpuapr2026.html
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: 4/21/2026, 9:47:16 PM
Last updated: 4/22/2026, 7:15:30 AM
Views: 7
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