EUVD-2026-62165
GHSA-v4pj-495m-jwpw
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor describes unauthenticated, easily exploitable HTTP-reachable takeover with full impact, supporting AV:N/AC:L/PR:N/UI:N and C:H/I:H/A:H; scope unchanged.
Primary rating from Vendor (oracle).
CVSS VectorVendor: oracle
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). The supported version that is affected is 1.4.20. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in takeover of Helidon. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
AnalysisAI
Remote takeover in Oracle Helidon 1.4.20 (Imperative Web Server component of Oracle Fusion Middleware) allows an unauthenticated attacker with network access over HTTP to fully compromise the affected instance. The flaw carries a critical CVSS 3.1 base score of 9.8 with high impact to confidentiality, integrity and availability, and is described by Oracle as easily exploitable. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network reachability to the Helidon Imperative (blocking) Web Server over HTTP on Oracle Helidon version 1.4.20; the CVSS vector AV:N/AC:L/PR:N/UI:N confirms no authentication, no user interaction, and low complexity against a reachable instance. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | All available severity signals point to high priority: the CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) describes a network-reachable, low-complexity, unauthenticated attack with no user interaction and complete impact, and Oracle explicitly labels it 'easily exploitable' resulting in 'takeover.' Counterbalancing this, several corroborating signals are absent: no EPSS score was provided, the issue is not in CISA KEV, no public POC is known, and no SSVC decision data was supplied - so real-world exploitation is currently unproven and the 9.8 rests on vendor scoring plus a deliberately terse Oracle CPU description. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who can reach the Helidon HTTP listener sends a crafted HTTP request directly to the Imperative Web Server, requiring no credentials and no user interaction. Given the low attack complexity and full C/I/A impact, a single successful request leads to compromise and takeover of the Helidon process and the application it hosts. … |
| Remediation | Apply the fixes from Oracle's August 2026 Critical Patch Update as referenced at https://www.oracle.com/security-alerts/cspuaug2026.html; the input does not specify an exact fixed Helidon build, so treat patch status as 'Patch available per vendor advisory' and consult that CPU for the precise remediated version. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an immediate inventory of all systems running Oracle Helidon 1.4.20 across your infrastructure and identify affected servers. …
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External POC / Exploit Code
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