Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessGain low-privileged AHF cluster access
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DeliveryPosition on adjacent network segment
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ExploitSatisfy high-complexity exploit conditions
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ExecutionBypass Cluster Health Analyzer authorization
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PersistRead and modify critical AHF data
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ImpactPivot to co-located Oracle cluster products
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 be positioned on the physical communication segment (same LAN, VLAN, or broadcast domain) attached to the hardware running Oracle Autonomous Health Framework - remote internet-based exploitation is not possible. The attacker must hold at minimum low-level authenticated access to the AHF environment (PR:L), ruling out fully unauthenticated external attackers. Attack complexity is rated High, indicating that specific race conditions, timing windows, or non-default environmental factors must be satisfied for the exploit to succeed - opportunistic or automated mass exploitation is unlikely under these conditions. The vulnerability is specifically within the Cluster Health Analyzer sub-component of AHF, so deployments of AHF that do not run or expose CHA may have reduced exposure (though this is not confirmed from the advisory). The scope change means that while initial access requires AHF proximity, downstream impact can extend to other Oracle products sharing the cluster, amplifying impact beyond the initial foothold. Authentication requirements are confirmed as low-privileged (not unauthenticated) based on PR:L in the provided CVSS vector. |
| Impact | The CVSS 7.7 base score reflects a scope-changed, high-confidentiality/integrity impact but is tempered significantly by two key constraint factors: AV:A (adjacent network only) and AC:H (high attack complexity). An attacker cannot reach this vulnerability from the internet; they must be physically or logically adjacent to the target hardware's network segment. Combined with the requirement for existing low-privileged access (PR:L), this is not an opportunistic, mass-exploitation scenario. No EPSS data was provided in the input, and the vulnerability is not listed in the CISA KEV catalog, indicating no confirmed active exploitation. The 'Authentication Bypass' tag introduces some ambiguity - if this means authentication can be fully bypassed rather than requiring low-privilege credentials, the PR:L assignment may understate attacker prerequisites, or may instead describe privilege escalation post-authentication. EPSS data is absent from the source intelligence, preventing probabilistic comparison. The scope change is the most significant real-world risk signal: compromise of AHF in a multi-product Oracle cluster could cascade to affect database integrity monitoring or cluster management functions beyond AHF itself. Organizations running Oracle RAC or Exadata clusters where AHF is deployed should treat this as a meaningful but non-emergency patch-cycle item. |
| Exploit ScenarioDerived | A low-privileged attacker with existing network access to the management segment of an Oracle cluster - for example, a database operator account or a compromised monitoring host on the same VLAN - sends specially crafted requests to the Cluster Health Analyzer component, bypassing authorization checks through the identified flaw. After successfully exploiting the high-complexity condition, the attacker gains full read and write access to AHF-managed diagnostic and configuration data, then leverages the scope change to access or tamper with data belonging to other Oracle components co-resident in the cluster. No public proof-of-concept code is known at time of analysis, meaning weaponization would require independent research into the specific protocol or API flaw in CHA. |
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Alert meAnalysisAIv1 – Aug 19, 2026
Unauthorized data access and modification in Oracle Autonomous Health Framework's Cluster Health Analyzer component allows a low-privileged attacker with adjacency to the physical communication segment to fully compromise confidentiality and integrity of AHF data, with scope change enabling lateral impact on additional Oracle products. Affected versions span the 26.x release line through 26.5.2, disclosed in Oracle's August 2026 Critical Patch Update. No public exploit code has been identified at time of analysis, and the High attack complexity combined with the adjacent-only attack vector materially constrains real-world exploitability despite the 7.7 base score.
RemediationAI
Apply Oracle's August 2026 Critical Patch Update, which addresses this vulnerability as part of the Oracle Autonomous Health Framework patch set; refer to https://www.oracle.com/security-alerts/cspuaug2026.html for download and installation instructions. An exact patched version number is not independently confirmed from the available advisory data - consult Oracle Support (My Oracle Support) to confirm the specific AHF build resolving CVE-2026-70717. As a compensating control while patching is underway, restrict network access to the AHF Cluster Health Analyzer service to only authorized cluster management hosts using host-based or network-level ACLs, which reduces the adjacent-network attack surface. Additionally, enforce the principle of least privilege by auditing which accounts hold any authenticated access to AHF and revoking unnecessary low-privileged credentials. Given the scope-change impact, isolating AHF management interfaces from general cluster networking via a dedicated management VLAN can contain potential lateral movement to adjacent Oracle products. Note that VLAN-based isolation does not eliminate the flaw but narrows the pool of potential attackers to those with management network access.
Affected VersionsENISA
Affected Packages
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
Oracle Autonomous Health Framework (AHF) is a diagnostics and health monitoring suite for Oracle cluster environments, including Oracle RAC and Exadata deployments. The Cluster Health Analyzer (CHA) is the AHF sub-component responsible for real-time performance diagnostics across cluster nodes. The CVSS vector (AV:A) indicates the exploitation pathway operates over the physical communication segment - meaning the attacker must be on the same LAN, VLAN, or network broadcast domain as the hardware hosting AHF, rather than exploiting it over the internet. The tag 'Authentication Bypass' suggests the flaw involves circumventing access controls within CHA, consistent with a low-privileged attacker (PR:L) achieving disproportionate data access. No CWE has been assigned, leaving the exact root cause class - whether it is improper authorization, deserialization, or a protocol-level weakness - unconfirmed from available data. The scope change (S:C) in the CVSS vector signals that a successful compromise of the AHF process can affect other systems or Oracle products co-located in the cluster environment.
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Severity by source
AV:P/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
Adjacent-only vector, high complexity, and existing low-privileged access required; scope change justified by cross-product cluster impact; no availability impact described.
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
3DescriptionNVD
Vulnerability in Oracle Autonomous Health Framework (component: Cluster Health Analyzer). Supported versions that are affected are 26-26.1.0, 26.2.0, 26.3.1, 26.5.0 and 26.5.2. Difficult to exploit vulnerability allows low privileged attacker with access to the physical communication segment attached to the hardware where the Oracle Autonomous Health Framework executes to compromise Oracle Autonomous Health Framework. While the vulnerability is in Oracle Autonomous Health Framework, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Autonomous Health Framework accessible data as well as unauthorized access to critical data or complete access to all Oracle Autonomous Health Framework accessible data. CVSS 3.1 Base Score 7.7 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N).
Executive ViewAI
Oracle Autonomous Health Framework versions 26.x through 26.5.2 contain a vulnerability enabling unauthorized access and modification of cluster health monitoring data, with confirmed lateral movement capability to other Oracle products. Organizations running affected versions face compromise of sensitive operational intelligence and potential cascade impact across their Oracle infrastructure.
No vendor-released patch identified at time of analysis. Interim mitigations include: network segmentation isolating AHF deployments from adjacent network segments; enforcement of principle-of-least-privilege for AHF component access; comprehensive monitoring and alerting for unauthorized data modification; and consideration of air-gapping critical AHF systems from shared infrastructure pending vendor guidance on permanent remediation timelines.
Threat Intelligence Overview
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.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
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