Skip to main content

Oracle Helidon CVE-2026-71153

| EUVDEUVD-2026-62095 HIGH
Improper Access Control (CWE-284)
2026-08-18 secalert_us@oracle.com GHSA-9596-wc5v-9gxg
Authentication Bypass Oracle Helidon
7.5
CVSS 3.1 · Vendor: oracle
Share

Severity by source

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

Network HTTP DoS requiring no auth or interaction; only availability impacted - AV:N, PR:N, A:H are all consistent with the description and vendor vector.

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

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

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

Lifecycle Timeline

2
Analysis Generated
Aug 18, 2026 - 22:17 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 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 unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Helidon. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

AnalysisAI

Remote unauthenticated denial-of-service in Oracle Helidon 1.4.20 allows network-accessible attackers to crash or indefinitely hang the Imperative Web Server via HTTP, with no authentication or user interaction required. The CVSS 3.1 score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) confirms trivially low exploitation complexity against exposed instances. …

Unlock full vulnerability intelligence

  • Risk assessment & exploitation conditions
  • Attack chain visualization
  • Remediation with exact patch versions
  • Threat intelligence from 22 sources
  • Personal watchlist & email alerts
Continue with Google Continue with GitHub

Free forever · No credit card required

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Delivery
technique details hidden
Exploit
technique details hidden
Execution
technique details hidden
Impact
technique details hidden
Sign in to reveal

Vulnerability AssessmentAI

Exploitation No special conditions - remote unauthenticated exploitation against default configurations of Oracle Helidon 1.4.20 Imperative Web Server. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS 7.5 is high severity and the vector (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) indicates maximum exploitation ease: network-reachable, no credentials, no user interaction, and low attack complexity. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Consult and apply the Oracle Critical Patch Update for August 2026 at https://www.oracle.com/security-alerts/cspuaug2026.html to remediate this vulnerability. … Detailed patch versions, workarounds, and compensating controls in full report.
Sign in to read full assessment

Recommended ActionAI

Within 24 hours: Inventory all systems running Oracle Helidon 1.4.20 and determine which are internet-exposed or accessible from untrusted networks. …

Sign in for detailed remediation steps and compensating controls.

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

More in Helidon

View all
CVE-2021-29425 MEDIUM POC
4.8 Apr 13

In Apache Commons IO before 2.7, When invoking the method FileNameUtils.normalize with an improper input string, like "/
CVE-2026-73930 CRITICAL
9.9 Aug 18

Scope-changing compromise of Oracle Helidon 4.5.3 (Imperative Web Server component) lets a remote, unauthenticated attac
CVE-2026-71164 CRITICAL
9.8 Aug 18

Full remote takeover in Oracle Helidon 3.2.18 (Fusion Middleware, Imperative Web Server component) allows an unauthentic
CVE-2026-71152 CRITICAL
9.8 Aug 18

Remote takeover in Oracle Helidon 4.5.0 lets an unauthenticated attacker fully compromise the framework's Imperative Web
CVE-2026-71074 CRITICAL
9.8 Aug 18

Remote takeover of Oracle Helidon 3.2.18 (Imperative Web Server component, part of Oracle Fusion Middleware) allows an u
CVE-2026-73921 CRITICAL
9.8 Aug 18

Remote takeover in Oracle Helidon 1.4.20 (Imperative Web Server component of Oracle Fusion Middleware) allows an unauthe
CVE-2026-73912 CRITICAL
9.8 Aug 18

Remote takeover of Oracle Helidon 4.5.0 is possible when an unauthenticated attacker reaches the Imperative Web Server c
CVE-2026-73905 CRITICAL
9.8 Aug 18

Complete takeover of Oracle Helidon 4.5.0 is achievable by remote, unauthenticated attackers over HTTP through the Imper
CVE-2026-71166 CRITICAL
9.4 Aug 18

Unauthenticated remote compromise of Oracle Helidon 3.2.18 (Imperative Web Server component) lets network attackers read
CVE-2026-73920 CRITICAL
9.4 Aug 18

Unauthenticated remote compromise in Oracle Helidon 4.5.0's Imperative Web Server component lets network attackers reach
CVE-2026-71167 CRITICAL
9.4 Aug 18

Unauthenticated remote compromise of Oracle Helidon 4.5.0 (Imperative Web Server component, part of Oracle Fusion Middle
CVE-2026-71065 CRITICAL
9.3 Aug 18

Authentication bypass in Oracle Helidon 3.2.18 (Imperative Web Server component of Oracle Fusion Middleware) lets an una

Same weakness CWE-284 – Improper Access Control

View all
CVE-2012-4681 CRITICAL POC
9.8
CVE-2011-3544 CRITICAL POC
9.8
CVE-2012-1723 CRITICAL POC
9.8
CVE-2012-5076 CRITICAL POC
9.8
CVE-2014-3120 HIGH POC
8.1
CVE-2013-2423 LOW POC
3.7
CVE-2016-3427 CRITICAL
9.8
CVE-2025-12480 CRITICAL POC
9.1

Same technique Authentication Bypass

View all
CVE-2023-22515 CRITICAL POC
9.8
CVE-2012-4681 CRITICAL POC
9.8
CVE-2013-2465 CRITICAL POC
9.8
CVE-2011-3544 CRITICAL POC
9.8
CVE-2022-40684 CRITICAL POC
9.8
CVE-2025-61882 CRITICAL POC
9.8
CVE-2024-0012 CRITICAL POC
9.3
CVE-2023-46805 HIGH POC
8.2

Share

CVE-2026-71153 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy