PT-2026-34100 · Oracle · Mysql Server

Published 2026-04-21 · Updated 2026-06-02 · CVE-2026-34276

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions MySQL Server versions 8.0.0 through 8.0.45 MySQL Server versions 8.4.0 through 8.4.8 MySQL Server versions 9.0.0 through 9.6.0

Description An issue exists in the Group Replication Plugin of MySQL Server. A low-privileged attacker with network access via multiple protocols can exploit this flaw to cause a hang or a frequently repeatable crash, resulting in a complete denial of service (DOS), which is a condition where the server becomes unavailable to legitimate users.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

ALSA-2026:20693

CVE-2026-34276

OESA-2026-2118

OESA-2026-2119

OESA-2026-2120

OESA-2026-2153

OESA-2026-2154

USN-8363-1

Affected Products

Mysql Server

References · 106

• https://ubuntu.com/security/CVE-2026-34303 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-35236 · Security Note
• https://ubuntu.com/security/CVE-2026-22009 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-22001 · Security Note
• https://ubuntu.com/security/CVE-2026-35236 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-35239 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-8363-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-22004 · Security Note
• https://ubuntu.com/security/CVE-2026-22004 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-34267 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-35237 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-34308 · Security Note
• https://osv.dev/vulnerability/OESA-2026-2119 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-22017 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-34278 · Security Note