CVE-2026-34272: 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-2026-34272 is a vulnerability in Oracle MySQL Server versions 9. 0. 0 through 9. 6. 0 affecting the Server Optimizer component. It allows a low privileged attacker with network access via multiple protocols to cause a denial of service by hanging or crashing the MySQL Server. The vulnerability has a CVSS 3. 1 base score of 6. 5, indicating a medium severity with impact on availability only. Oracle has included this vulnerability in its April 2026 Critical Patch Update advisory, which provides patches addressing this and many other vulnerabilities.
AI Analysis
Technical Summary
This vulnerability in Oracle MySQL Server's optimizer component allows an attacker with low privileges and network access to cause a hang or repeated crash, resulting in a complete denial of service. It affects MySQL Server versions 9.0.0 through 9.6.0. The CVSS 3.1 vector indicates network attack vector, low attack complexity, low privileges required, no user interaction, unchanged scope, no confidentiality or integrity impact, and high availability impact. Oracle's April 2026 Critical Patch Update includes patches for this vulnerability among 481 other security fixes. The vendor strongly recommends applying these patches promptly to mitigate the risk.
Potential Impact
Successful exploitation results in denial of service by causing the MySQL Server to hang or crash repeatedly, impacting availability. There is no impact on confidentiality or integrity. The vulnerability requires low privileges and network access, making it relatively easy to exploit for causing service disruption. No known exploits have been reported in the wild so far.
Mitigation Recommendations
Oracle has released patches for this vulnerability as part of the April 2026 Critical Patch Update. Users should apply the April 2026 CPU promptly to remediate this issue. Oracle strongly recommends staying on actively supported versions and applying all Critical Patch Updates without delay. Patch status is confirmed as available via the vendor advisory: https://www.oracle.com/security-alerts/cpuapr2026.html
CVE-2026-34272: 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-2026-34272 is a vulnerability in Oracle MySQL Server versions 9. 0. 0 through 9. 6. 0 affecting the Server Optimizer component. It allows a low privileged attacker with network access via multiple protocols to cause a denial of service by hanging or crashing the MySQL Server. The vulnerability has a CVSS 3. 1 base score of 6. 5, indicating a medium severity with impact on availability only. Oracle has included this vulnerability in its April 2026 Critical Patch Update advisory, which provides patches addressing this and many other vulnerabilities.
CVSS v3.1
Score 6.5medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Oracle MySQL Server's optimizer component allows an attacker with low privileges and network access to cause a hang or repeated crash, resulting in a complete denial of service. It affects MySQL Server versions 9.0.0 through 9.6.0. The CVSS 3.1 vector indicates network attack vector, low attack complexity, low privileges required, no user interaction, unchanged scope, no confidentiality or integrity impact, and high availability impact. Oracle's April 2026 Critical Patch Update includes patches for this vulnerability among 481 other security fixes. The vendor strongly recommends applying these patches promptly to mitigate the risk.
Potential Impact
Successful exploitation results in denial of service by causing the MySQL Server to hang or crash repeatedly, impacting availability. There is no impact on confidentiality or integrity. The vulnerability requires low privileges and network access, making it relatively easy to exploit for causing service disruption. No known exploits have been reported in the wild so far.
Mitigation Recommendations
Oracle has released patches for this vulnerability as part of the April 2026 Critical Patch Update. Users should apply the April 2026 CPU promptly to remediate this issue. Oracle strongly recommends staying on actively supported versions and applying all Critical Patch Updates without delay. Patch status is confirmed as available via the vendor advisory: https://www.oracle.com/security-alerts/cpuapr2026.html
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- oracle
- Date Reserved
- 2026-03-26T19:48:45.674Z
- 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: 69e7e5a219fe3cd2cdf9f7ae
Added to database: 4/21/2026, 9:01:22 PM
Last enriched: 4/29/2026, 11:34:32 AM
Last updated: 6/5/2026, 1:38:35 PM
Views: 54
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