PT-2026-34127 · Oracle+1 · Mysql Server+1

Published 2026-04-21 · Updated 2026-06-04 · CVE-2026-34303

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 Oracle MySQL Server versions 8.0.0 through 8.0.45 Oracle MySQL Server versions 8.4.0 through 8.4.8 Oracle MySQL Server versions 9.0.0 through 9.6.0

Description An issue exists in the Server: Optimizer component of MySQL Server. A low privileged attacker with network access via multiple protocols can exploit this flaw to cause a hang or frequently repeatable crash, resulting in a complete denial of service (DOS), which is a condition where the system becomes unavailable to its intended users.

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

DoS

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

ALSA-2026:20693

ALSA-2026:23332

CVE-2026-34303

OESA-2026-2118

OESA-2026-2119

OESA-2026-2120

OESA-2026-2153

OESA-2026-2154

OPENSUSE-SU-2026:10897-1

USN-8363-1

USN-8363-2

Affected Products

Mysql Server

Ubuntu

References · 129

• https://osv.dev/vulnerability/USN-8363-1 · Vendor Advisory
• https://osv.dev/vulnerability/USN-8363-2 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-35237 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-34303 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-35238 · Security Note
• https://errata.almalinux.org/10/ALSA-2026-20693.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-22001 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-22017 · Security Note
• https://ubuntu.com/security/CVE-2026-22015 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-34317 · Security Note
• https://ubuntu.com/security/CVE-2026-34308 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-34276 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-22005 · Security Note
• https://ubuntu.com/security/CVE-2026-34267 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-22004 · Vendor Advisory