What is the CVSS score of CVE-2026-73879?

CVE-2026-73879 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N. EPSS exploitation probability: 0.3%.

Which versions of Oracle Helidon are affected by CVE-2026-73879?

Oracle Helidon 4.5.1 poses an immediate data protection risk: remote attackers can alter or destroy critical business data without authentication, threatening operational continuity and data…

How to fix or mitigate CVE-2026-73879?

Within 24 hours, audit your environment for all Oracle Helidon 4.5.1 deployments and immediately restrict network access to trusted internal networks only; document version inventory across all Helidon instances. Within 7 days, implement network segmentation to block all HTTP access to Helidon servers from public or untrusted networks, deploy web application firewall (WAF) rules to detect and block unauthorized data modification requests, and establish a vendor escalation process for patch tracking. Within 30 days, complete evaluation of Helidon upgrade paths or alternative solutions, establish a formal migration timeline once Oracle releases a patched version (4.5.2 or later), and conduct a comprehensive data integrity audit of all systems previously exposed to public networks.

Oracle Helidon CVE-2026-73879

EUVD-2026-62123 HIGH

Improper Access Control (CWE-284)

2026-08-18 secalert_us@oracle.com

GHSA-cw22-2p8j-jw33

Authentication Bypass Oracle Helidon

7.5

CVSS 3.1 · Vendor: oracle

Severity by source

Vendor (oracle) PRIMARY

7.5 HIGH

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

vuln.today AI

7.5 HIGH

Network-reachable authentication bypass with no prerequisites; integrity-only impact aligns with unauthorized data mutation without disclosure or service disruption.

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

4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Lifecycle Timeline

Analysis Generated

Aug 18, 2026 - 22:10 vuln.today

CVE Published

Aug 18, 2026 - 21:18 nvd

HIGH 7.5

DescriptionCVE.org

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). The supported version that is affected is 4.5.1. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Helidon accessible data. CVSS 3.1 Base Score 7.5 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N).

AnalysisAI

Unauthenticated remote attackers can create, delete, or modify critical data in Oracle Helidon 4.5.1 by bypassing authentication controls in the Imperative Web Server component over HTTP. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N) confirms exploitation requires only network reachability with no credentials, no user interaction, and no elevated access - placing this firmly in the easily exploitable category per Oracle's own classification. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Identify internet-exposed Helidon 4.5.1 HTTP endpoint

Delivery

Send unauthenticated HTTP request to protected resource

Exploit

Authentication bypass in Imperative Web Server grants access

Execution

Issue create/modify/delete operation on critical data

Impact

Corrupt, destroy, or inject application data

Access

Identify internet-exposed Helidon 4.5.1 HTTP endpoint

Delivery

Send unauthenticated HTTP request to protected resource

Exploit

Authentication bypass in Imperative Web Server grants access

Execution

Issue create/modify/delete operation on critical data

Impact

Corrupt, destroy, or inject application data

Vulnerability AssessmentAI

Exploitation	The CVSS vector (AV:N/AC:L/PR:N/UI:N) confirms no special conditions - remote unauthenticated exploitation against Helidon 4.5.1 Imperative Web Server instances accessible over HTTP. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	The CVSS 7.5 High score is supported by a fully remote, unauthenticated, low-complexity attack profile - all the worst-case metric values for access. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker identifies a publicly accessible Oracle Helidon 4.5.1 Imperative Web Server endpoint and sends crafted HTTP requests that bypass the server's authentication checks - requiring no credentials and no precondition beyond network connectivity. Once past the authentication control, the attacker issues write or delete operations against application data, potentially corrupting records, deleting critical entries, or injecting malicious content. …
Remediation	Apply Oracle's Critical Patch Update for August 2026, available at https://www.oracle.com/security-alerts/cspuaug2026.html. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, audit your environment for all Oracle Helidon 4.5.1 deployments and immediately restrict network access to trusted internal networks only; document version inventory across all Helidon instances. …

Threat intelligence, references, and detailed analysis are available after sign-in.