CVE-2026-34276: 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: Group Replication Plugin). 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 exists in the Group Replication Plugin component of Oracle MySQL Server. It is exploitable by an attacker with low privileges who can access the server over the network using multiple protocols. Successful exploitation results in the ability to cause the MySQL Server to hang or crash repeatedly, leading to a complete denial of service. The CVSS 3.1 base score is 6.5, reflecting a medium severity with an emphasis on availability impact. Oracle's April 2026 Critical Patch Update includes patches for affected MySQL Server versions, addressing this vulnerability among others.
Potential Impact
The vulnerability allows unauthorized denial of service attacks against MySQL Server, causing it to hang or crash repeatedly. This disrupts availability of the database service but does not compromise confidentiality or integrity of data. There are no reports of active exploitation in the wild. The impact is limited to service disruption.
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 affected MySQL Server versions to remediate this issue. Oracle strongly recommends staying on actively-supported versions and applying security patches without delay. Patch status is confirmed by the vendor advisory. No additional mitigation steps are specified beyond applying the official patch.
CVE-2026-34276: 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: Group Replication Plugin). 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 exists in the Group Replication Plugin component of Oracle MySQL Server. It is exploitable by an attacker with low privileges who can access the server over the network using multiple protocols. Successful exploitation results in the ability to cause the MySQL Server to hang or crash repeatedly, leading to a complete denial of service. The CVSS 3.1 base score is 6.5, reflecting a medium severity with an emphasis on availability impact. Oracle's April 2026 Critical Patch Update includes patches for affected MySQL Server versions, addressing this vulnerability among others.
Potential Impact
The vulnerability allows unauthorized denial of service attacks against MySQL Server, causing it to hang or crash repeatedly. This disrupts availability of the database service but does not compromise confidentiality or integrity of data. There are no reports of active exploitation in the wild. The impact is limited to service disruption.
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 affected MySQL Server versions to remediate this issue. Oracle strongly recommends staying on actively-supported versions and applying security patches 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
- 2026-03-26T19:48:45.675Z
- 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: 69e7e5a219fe3cd2cdf9f7ba
Added to database: 4/21/2026, 9:01:22 PM
Last enriched: 4/21/2026, 10:03:19 PM
Last updated: 4/22/2026, 6:08:44 AM
Views: 4
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.