CVE-2026-34270: 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-2026-34270 is a vulnerability in Oracle MySQL Server's Group Replication Plugin affecting versions 8. 0. 0 through 8. 0. 45, 8. 4. 0 through 8. 4. 8, and 9. 0.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-34270) affects the Group Replication Plugin component of Oracle MySQL Server across multiple supported versions. It permits a low privileged attacker with network access to cause a hang or repeated crash of the MySQL Server, resulting in a denial of service condition. The CVSS vector indicates network attack vector, low attack complexity, low privileges required, no user interaction, unchanged scope, no confidentiality or integrity impact, but high availability impact. Oracle has addressed this vulnerability in its April 2026 Critical Patch Update, which includes patches for MySQL Server versions 8.0.0-8.0.45, 8.4.0-8.4.8, and 9.0.0-9.6.0. No public exploits have been reported. The advisory strongly recommends applying the update promptly.
Potential Impact
Successful exploitation allows an attacker with low privileges and network access to cause a hang or frequent crash of the MySQL Server, resulting in a complete denial of service. There is no impact on confidentiality or integrity. The availability impact is rated high, with an overall CVSS score of 6.5 (medium severity). No known exploits in the wild have been reported so far.
Mitigation Recommendations
Oracle has released patches for this vulnerability as part of the April 2026 Critical Patch Update. Users should apply the relevant patches for their MySQL Server versions (8.0.0-8.0.45, 8.4.0-8.4.8, 9.0.0-9.6.0) without delay to remediate this issue. There is no indication that the vulnerability is mitigated without patching. No additional vendor-recommended mitigations are noted in the advisory.
CVE-2026-34270: 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-2026-34270 is a vulnerability in Oracle MySQL Server's Group Replication Plugin affecting versions 8. 0. 0 through 8. 0. 45, 8. 4. 0 through 8. 4. 8, and 9. 0.
CVSS v3.1
Score 6.5medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-34270) affects the Group Replication Plugin component of Oracle MySQL Server across multiple supported versions. It permits a low privileged attacker with network access to cause a hang or repeated crash of the MySQL Server, resulting in a denial of service condition. The CVSS vector indicates network attack vector, low attack complexity, low privileges required, no user interaction, unchanged scope, no confidentiality or integrity impact, but high availability impact. Oracle has addressed this vulnerability in its April 2026 Critical Patch Update, which includes patches for MySQL Server versions 8.0.0-8.0.45, 8.4.0-8.4.8, and 9.0.0-9.6.0. No public exploits have been reported. The advisory strongly recommends applying the update promptly.
Potential Impact
Successful exploitation allows an attacker with low privileges and network access to cause a hang or frequent crash of the MySQL Server, resulting in a complete denial of service. There is no impact on confidentiality or integrity. The availability impact is rated high, with an overall CVSS score of 6.5 (medium severity). No known exploits in the wild have been reported so far.
Mitigation Recommendations
Oracle has released patches for this vulnerability as part of the April 2026 Critical Patch Update. Users should apply the relevant patches for their MySQL Server versions (8.0.0-8.0.45, 8.4.0-8.4.8, 9.0.0-9.6.0) without delay to remediate this issue. There is no indication that the vulnerability is mitigated without patching. No additional vendor-recommended mitigations are noted in the advisory.
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: 69e7e5a019fe3cd2cdf9f746
Added to database: 4/21/2026, 9:01:20 PM
Last enriched: 4/29/2026, 11:34:16 AM
Last updated: 6/4/2026, 3:14:37 AM
Views: 56
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