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
Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 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 Oracle MySQL Server (versions 9.0.0-9.6.0) affects the Server Optimizer component and allows a low 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 6.5, reflecting a medium severity with an impact on availability only (no confidentiality or integrity impact). The vulnerability is addressed in Oracle's April 2026 Critical Patch Update, which includes patches for MySQL Server among many other Oracle products. Oracle strongly recommends applying this update promptly to mitigate the risk.
Potential Impact
Successful exploitation of this vulnerability allows an attacker with low privileges and network access to cause a denial of service by hanging or crashing the MySQL Server. This impacts the availability of the database service but does not compromise data confidentiality or integrity. There are no known exploits in the wild at this time.
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 mitigate this vulnerability. Oracle strongly recommends remaining on actively-supported versions and applying Critical Patch Updates without delay. Patch status is confirmed by the vendor advisory. No additional mitigation steps are specified beyond applying the official patch.
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
Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 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 Oracle MySQL Server (versions 9.0.0-9.6.0) affects the Server Optimizer component and allows a low 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 6.5, reflecting a medium severity with an impact on availability only (no confidentiality or integrity impact). The vulnerability is addressed in Oracle's April 2026 Critical Patch Update, which includes patches for MySQL Server among many other Oracle products. Oracle strongly recommends applying this update promptly to mitigate the risk.
Potential Impact
Successful exploitation of this vulnerability allows an attacker with low privileges and network access to cause a denial of service by hanging or crashing the MySQL Server. This impacts the availability of the database service but does not compromise data confidentiality or integrity. There are no known exploits in the wild at this time.
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 mitigate this vulnerability. Oracle strongly recommends remaining on actively-supported versions and applying Critical Patch Updates without delay. Patch status is confirmed by the vendor advisory. No additional mitigation steps are specified beyond applying the official patch.
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: 4/21/2026, 10:03:44 PM
Last updated: 4/22/2026, 6:06:53 AM
Views: 3
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.