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MySQL Server CVE-2026-101795

| EUVDEUVD-2026-106196 MEDIUM
Improper Access Control (CWE-284)
2026-10-20 secalert_us@oracle.com GHSA-vwvv-hmcv-q64x
6.7
CVSS 3.1 · Vendor: oracle
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Obtain high-privileged local logon to DB host
  2. Exploit
    Abuse Components Services on MySQL Server/Cluster
  3. Execution
    Escalate to full instance control
  4. Impact
    Takeover of MySQL data and availability

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Access control enforcement
MITRE ATT&CK

1 technique across 1 tactic: Defense Evasion

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires the attacker to already have a high-privileged account able to log on to the infrastructure (operating system/host) where MySQL Server or MySQL Cluster executes; the attack targets the 'Server: Components Services' component. The decisive limiting factor is PR:H combined with AV:L - this is not remotely reachable and cannot be triggered by an unauthenticated or low-privileged user. Affected: MySQL Server 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1; MySQL Cluster 8.0.0-8.0.49, 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1. No user interaction is required (UI:N), but the required pre-existing high privilege on the host sharply narrows the realistic attacker population to insiders or already-compromised privileged accounts.

Impact

Signals are moderate and internally consistent. The CVSS 3.1 base score is 6.7 (MEDIUM), driven by AV:L (local/logon required), AC:L, and critically PR:H - the attacker must already hold high privileges on the host where MySQL Server/Cluster runs. Offsetting that gatekeeper is full C:H/I:H/A:H impact: Oracle's own wording says successful attacks can result in complete takeover of MySQL Server/Cluster. No EPSS score, CISA KEV entry, or public POC is present in the provided data, so there is no public exploit identified at time of analysis and no evidence of active exploitation. The practical result is a relatively low real-world priority despite the alarming 'takeover' language: the PR:H + AV:L combination means the attacker must already be a privileged local user, making this a privilege-consolidation/post-compromise issue rather than an internet-facing entry point. One inconsistency to verify: the 'Information Disclosure' tag understates the issue, which the CVSS vector scores as full confidentiality, integrity, and availability compromise, not mere disclosure.

Exploit ScenarioDerived

An attacker who already has high-privileged local access (e.g. an OS account able to log on to the database host, or a compromised DBA/service account) abuses the Server: Components Services component to escalate to full control of the MySQL Server/Cluster instance. No user interaction is required and attack complexity is low, but the attacker must first obtain the privileged local foothold. No public exploit code is identified at time of analysis.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 21, 2026

High-privileged local attackers can take over Oracle MySQL Server and MySQL Cluster through the Server: Components Services component, affecting MySQL Server 8.4.0-8.4.12, 9.7.0-9.7.3, and 26.7.0-26.7.1 plus MySQL Cluster 8.0.0-8.0.49, 8.4.0-8.4.12, 9.7.0-9.7.3, and 26.7.0-26.7.1. The CVSS 3.1 score is 6.7 (AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H), so exploitation requires an existing high-privileged account with logon to the MySQL host rather than remote or unauthenticated access. No CISA KEV listing or public exploit code is reported in the supplied data; no public exploit identified at time of analysis.

RemediationAI

Use the Oracle Critical Patch Update advisory at https://www.oracle.com/security-alerts/cpuoct2026.html to identify and apply the fixed MySQL Server and MySQL Cluster release for each affected version; no exact fix version is specified in the supplied data, so confirm the patched release with Oracle before upgrading. Until patching is complete, reduce the privileged local attack surface by restricting host logon and OS-level administrative access to a minimal set of accounts, enforcing least privilege and just-in-time elevation for MySQL administrators, and auditing privileged sessions on database hosts. Where operationally feasible, disable or restrict unused MySQL component services and isolate database hosts from broader administrative networks, accepting that this may affect monitoring or management workflows. Monitor for suspicious privileged local activity and credential misuse because exploitation requires an already high-privileged account. Patch status is not confirmed from the available data, and no public exploit was identified at time of analysis.

Affected VersionsENISA

MySQL Server 26.7.0-26.7.1
MySQL Cluster 9.7.0-9.7.3
MySQL Cluster 8.4.0-8.4.12
MySQL Server 9.7.0-9.7.3
MySQL Cluster 8.0.0-8.0.49
MySQL Cluster 26.7.0-26.7.1
MySQL Server 8.4.0-8.4.12

Affected Packages

euvd mysql_cluster no fix
euvd mysql_server no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 2 packages in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Oracle MySQL Server and MySQL Cluster are database platforms, and this issue is in the 'Server: Components Services' component. The supplied CVSS vector indicates local access (AV:L), low attack complexity (AC:L), high privileges (PR:H), no user interaction (UI:N), and high confidentiality, integrity, and availability impact; no CWE is assigned in the input data. The public description does not disclose the specific implementation defect, so the root-cause class cannot be confirmed beyond the privileged local attack path. Because the vector is not network-reachable, exposure depends on who can log on to the MySQL host and obtain high privilege, such as administrators or already-compromised privileged accounts. No CPE strings were supplied for finer product identification.

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Severity by source

Vendor (oracle) PRIMARY 6.7 MEDIUM
AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
vuln.today AI 6.7 MEDIUM

Requires high-privileged local logon to the DB host (AV:L, PR:H), no user interaction, and yields full server takeover (C:H/I:H/A:H), matching Oracle's assessment.

3.1 AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
4.0 AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Red Hat 6.7 MEDIUM

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionCVE.org

Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Components Services). Supported versions that are affected are MySQL Server: 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1; MySQL Cluster: 8.0.0-8.0.49, 8.4.0-8.4.12, 9.7.0-9.7.3 and 26.7.0-26.7.1. Easily exploitable vulnerability allows high privileged attacker with logon to the infrastructure where MySQL Server, MySQL Cluster executes to compromise MySQL Server, MySQL Cluster. Successful attacks of this vulnerability can result in takeover of MySQL Server, MySQL Cluster. CVSS 3.1 Base Score 6.7 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).

Threat Intelligence Overview

EPSS Score
0.2%
Top 96% exploitable
Prevalence
Ubiquitous
MySQL is among the most widely deployed databases worldwide
Data Quality
4 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.2%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation· derived
None
System Exposure· derived
Small
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

34
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +34
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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Vendor StatusVendor

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