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MySQL Connector/ODBC CVE-2026-101806

| EUVDEUVD-2026-106207 MEDIUM
Improper Access Control (CWE-284)
2026-10-20 secalert_us@oracle.com GHSA-528m-j24c-3368
6.8
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 low-privilege network access
  2. Delivery
    Establish Connector/ODBC session over supported protocol
  3. Exploit
    Satisfy high-complexity trigger conditions
  4. Execution
    Exploit connector data-handling flaw
  5. Impact
    Read or modify critical connector-accessible data

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 targets Oracle MySQL Connector/ODBC version 26.7.1 and requires the attacker to hold low-level privileges (PR:L) and network reachability over one of the multiple supported protocols; no user interaction is needed (UI:N). The principal limiting factor is the high attack complexity (AC:H): success depends on connection/server-state conditions outside the attacker's control, meaning it cannot be reliably triggered against an arbitrary target on demand. Oracle does not document the exact feature or configuration flag involved, so the precise triggering condition is not specified in available data; impact is confined to confidentiality and integrity of connector-accessible data with no availability effect.

Impact

This is a moderate-severity issue (CVSS 3.1 base 6.8) that should be patched in Oracle's October 2026 CPU cycle but does not warrant emergency out-of-band response. The CVSS vector (AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N) shows network reachability but is tempered by two meaningful brakes: AC:H (high attack complexity - conditions exist outside the attacker's control) and PR:L (the attacker must already hold low-level privileges). Impact is significant where it lands - High confidentiality and High integrity - but there is no availability impact (A:N), so this is a data-disclosure/data-tampering problem rather than a crash/DoS. No EPSS score, no CISA KEV listing, and no public exploit were provided in the input, so there is no evidence of active or at-scale exploitation; exploitation status is best characterized as no public exploit identified at time of analysis. The SSVC framework cannot be fully populated (no automatable/exploitation-maturity data supplied), but the AC:H + PR:L combination argues against easy automation. One signal to verify: the input Tag 'Authentication Bypass' conflicts with the CVSS, which requires PR:L (an already-privileged actor) and describes data-access compromise rather than any bypass of authentication - treat the tag as suspect pending vendor confirmation. Net: real but not urgent; prioritize in normal patch cadence.

Exploit ScenarioDerived

A low-privileged actor on the network who can influence a MySQL Connector/ODBC session (for example via a malicious or compromised endpoint reachable over one of the supported protocols) crafts the specific conditions needed to trigger the flaw and reads or tampers with data accessible through the connector. The high attack complexity means the attacker must line up server/connection conditions outside their direct control, so exploitation is non-trivial. No public exploit code was identified in the provided data.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 21, 2026

Oracle MySQL Connector/ODBC 26.7.1 can allow a low-privileged, network-positioned attacker to read and modify connector-accessible data, but only under high-complexity conditions outside the attacker's control (CVSS 3.1 base 6.8, AC:H/PR:L/UI:N). The flaw affects confidentiality and integrity with no availability impact, and no public exploit code or CISA KEV entry was identified at time of analysis.

RemediationAI

Apply Oracle's October 2026 Critical Patch Update and upgrade Connector/ODBC from 26.7.1 to the fixed release identified in the advisory; the exact fixed version is not specified in the available data. Until upgrade, restrict network access to MySQL Connector/ODBC deployments to trusted hosts and enforce least-privilege database accounts, accepting that network ACLs can break legitimate remote clients and least privilege can affect application functionality. Monitor for anomalous connector traffic; because no public exploit was identified, emergency out-of-band response is not indicated. Vendor advisory: https://www.oracle.com/security-alerts/cpuoct2026.html.

Affected VersionsENISA

MySQL Connectors 26.7.1

Affected Packages

euvd mysql_connectors no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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

Technical ContextAI · show details

MySQL Connector/ODBC is Oracle's ODBC driver used by client applications to connect to MySQL databases. The affected supported version is 26.7.1 within Oracle MySQL Connectors. No CWE is assigned, so the formal root-cause class is not documented; Oracle describes a difficult-to-exploit condition reachable over multiple protocols by a low-privileged attacker. The assessed CVSS vector (AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N) indicates network reachability, high attack complexity, low privileges, no user interaction, unchanged scope, high confidentiality and integrity impact, and no availability impact. The supplied 'Authentication Bypass' tag should not be interpreted as unauthenticated exploitation, because the assessed vector requires PR:L. Oracle does not document the exact feature or configuration flag involved, so the precise triggering condition is not specified in available data.

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Severity by source

Vendor (oracle) PRIMARY 6.8 MEDIUM
AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
vuln.today AI 6.8 MEDIUM

Concurs with Oracle: network-reachable over multiple protocols (AV:N) but non-trivial preconditions (AC:H) and an already-privileged actor (PR:L); High C and I, no availability impact (A:N).

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

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

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

DescriptionCVE.org

Vulnerability in the MySQL Connectors product of Oracle MySQL (component: Connector/ODBC). The supported version that is affected is 26.7.1. Difficult to exploit vulnerability allows low privileged attacker with network access via multiple protocols to compromise MySQL Connectors. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all MySQL Connectors accessible data as well as unauthorized access to critical data or complete access to all MySQL Connectors accessible data. CVSS 3.1 Base Score 6.8 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N).

Threat Intelligence Overview

EPSS Score
0.3%
Top 79% exploitable
Prevalence
Medium
MySQL Connector/ODBC is a common but driver-specific component, not universal connectivity
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 0.3%
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
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
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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