Helidon vulnerabilities
112 known CVE vulnerabilities in Helidon, translated and rated.
- CVE-2026-73930Critical
Vulnerability in Oracle Fusion Middleware Helidon (Imperative Web Server component) affects versions 3.0.0-3.2.19 and 4.0.0-4.5.2. Easily exploitable flaw allows unauthenticated attacker with network access via HTTP to perform unauthorized creation, deletion, or modification of data, unauthorized read access to a subset of data, and cause partial denial of service. Attacks may impact additional products (scope change). CVSS score 9.9.
- CVE-2026-73924Critical
Vulnerability in Oracle Fusion Middleware Helidon (Imperative Web Server) versions 1.0.0-1.4.18. Allows unauthenticated attacker via HTTP to perform unauthorized creation, deletion, or modification of data and access data. CVSS 9.1.
- CVE-2026-73922Critical
Vulnerability in Oracle Fusion Middleware Helidon (Imperative Web Server) versions 1.0.0-1.4.18. Allows unauthenticated attacker via HTTP to perform unauthorized creation, deletion, or modification of data and access data. CVSS 9.1.
- CVE-2026-73921Critical
Vulnerability in Oracle Fusion Middleware Helidon (Imperative Web Server component) affects versions 1.0.0-1.4.19. Easily exploitable flaw allows unauthenticated attacker with network access via HTTP to take over Helidon. CVSS score 9.8.
- CVE-2026-73920Critical
Vulnerability in Oracle Fusion Middleware Helidon (Imperative Web Server) versions 4.0.0-4.4.1. Allows unauthenticated attacker via HTTP to perform unauthorized creation, deletion, or modification of data, access data, and cause partial denial of service. CVSS 9.4.
- CVE-2026-73917Critical
Vulnerability in Oracle Fusion Middleware Helidon (Imperative Web Server component) affects versions 4.0.0-4.4.1. Easily exploitable flaw allows unauthenticated attacker with network access via HTTP to perform unauthorized creation, deletion, or modification of data and unauthorized access to data. CVSS score 9.1.
- CVE-2026-73916Critical
Vulnerability in Oracle Fusion Middleware Helidon (Imperative Web Server component) affects versions 3.0.0-3.2.17. Easily exploitable flaw allows unauthenticated attacker with network access via HTTP to perform unauthorized creation, deletion, or modification of data and unauthorized access to data. CVSS score 9.1.
- CVE-2026-73912Critical
Vulnerability in Oracle Fusion Middleware Helidon (Imperative Web Server component) affects versions 4.0.0-4.4.1. Easily exploitable flaw allows unauthenticated attacker with network access via HTTP to take over Helidon. CVSS score 9.8.
- CVE-2026-73905Critical
Vulnerability in Oracle Fusion Middleware Helidon (Imperative Web Server component) versions 4.0.0-4.4.1. Easily exploitable by unauthenticated attacker with network access via HTTP, allowing takeover of Helidon. CVSS 9.8 (high impact on confidentiality, integrity, and availability).
- CVE-2026-73866Critical
Vulnerability in Oracle Fusion Middleware Helidon (Imperative Web Server component) affects versions 4.0.0-4.4.1. Easily exploitable flaw allows unauthenticated attacker with network access via HTTP to perform unauthorized creation, deletion, or modification of data and unauthorized access to data. CVSS score 9.1.
- CVE-2026-73865Critical
Vulnerability in Oracle Fusion Middleware Helidon (Imperative Web Server) versions 3.0.0-3.2.17. Allows unauthenticated attacker via HTTP to perform unauthorized creation, deletion, or modification of data and access data. CVSS 9.1.
- CVE-2026-71167Critical
Vulnerability in Oracle Fusion Middleware Helidon (Imperative Web Server) versions 4.0.0-4.4.1. Allows unauthenticated attacker via HTTP to perform unauthorized creation, deletion, or modification of data, access data, and cause partial denial of service. CVSS 9.4.
- CVE-2026-71166Critical
Vulnerability in Oracle Fusion Middleware Helidon (Imperative Web Server component) affects versions 3.0.0-3.2.17. Easily exploitable flaw allows unauthenticated attacker with network access via HTTP to perform unauthorized creation, deletion, or modification of data, unauthorized access to data, and cause partial denial of service. CVSS score 9.4.
- CVE-2026-71164Critical
Vulnerability in Oracle Fusion Middleware Helidon (Imperative Web Server component) affects versions 3.0.0-3.2.17. Easily exploitable flaw allows unauthenticated attacker with network access via HTTP to take over Helidon. CVSS score 9.8.
- CVE-2026-71152Critical
Vulnerability in Oracle Fusion Middleware Helidon (Imperative Web Server component) affects versions 3.0.0-3.2.17 and 4.0.0-4.4.1. Easily exploitable flaw allows unauthenticated attacker with network access via HTTP to take over Helidon. CVSS score 9.8.
- CVE-2026-71074Critical
Vulnerability in Oracle Fusion Middleware Helidon (Imperative Web Server component) affects versions 1.0.0-1.4.19 and 3.0.0-3.2.17. Easily exploitable flaw allows unauthenticated attacker with network access via HTTP to take over Helidon. CVSS score 9.8.
- CVE-2026-71065Critical
Vulnerability in Oracle Fusion Middleware Helidon (Imperative Web Server) versions 3.0.0-3.2.17. Allows unauthenticated attacker via HTTP to gain unauthorized access to data and perform unauthorized update, insert, or delete of some data. Attacks may impact additional products (scope change). CVSS 9.3.
- CVE-2026-87289High
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-webserver-static-content). Affected supported versions are 4.0.0-4.5.4. An unauthenticated attacker with network access via HTTP can cause a hang or frequently repeatable crash (complete DOS) of Helidon.
- CVE-2026-83488Medium
Vulnerability in Helidon (helidon-microprofile-security component) versions 4.0.0-4.5.4. A low-privileged attacker with network access via HTTP can gain unauthorized update/insert/delete and read access to data.
- CVE-2026-83480Medium
Vulnerability in Helidon (WebSocket component) versions 4.0.0-4.5.4. An unauthenticated attacker with network access via HTTP can cause a partial denial of service (partial DoS).
- CVE-2026-83460Medium
Vulnerability in Oracle Fusion Middleware Helidon product (component: LRA) affects versions 4.0.0-4.5.4. An unauthenticated attacker with network access via HTTP can compromise Helidon, leading to unauthorized update, insert, delete, and read access to some Helidon accessible data.
- CVE-2026-83459Medium
Vulnerability in Oracle Fusion Middleware Helidon product (component: helidon-media-multipart) affects versions 3.0.0-3.2.20. An unauthenticated attacker with network access via HTTP can cause a partial denial of service (partial DoS) of Helidon.
- CVE-2026-83458Medium
Vulnerability in Oracle Fusion Middleware Helidon product (component: JSON) affects versions 4.0.0-4.5.4. An unauthenticated attacker with network access via HTTP can cause a partial denial of service (partial DoS) of Helidon.
- CVE-2026-83439High
Vulnerability in Helidon of Oracle Fusion Middleware (component: helidon-security-providers-idcs-mapper). Affects versions 3.0.0-3.2.20 and 4.0.0-4.5.4. A low privileged attacker with network access via HTTP can compromise Helidon, leading to unauthorized access and modification of data. CVSS 8.1.
- CVE-2026-83330High
Vulnerability in Helidon (WebSocket component) of Oracle Fusion Middleware (versions 4.0.0-4.5.4). An unauthenticated attacker with network access via HTTP can easily exploit this flaw to cause a hang or frequent crashes (complete DoS) of Helidon. CVSS 7.5 (Availability impact).
- CVE-2026-83281High
Vulnerability in Oracle Fusion Middleware Helidon product (helidon-webserver component) affects versions 4.0.0-4.5.4. An unauthenticated attacker with network access via TCP can cause a hang or frequently repeatable crash (complete DOS). The vulnerability is easily exploitable.
- CVE-2026-83280High
Vulnerability in Oracle Fusion Middleware Helidon product (helidon-webserver-http2 component) affects versions 4.0.0-4.5.4. An unauthenticated attacker with network access via HTTP/2 can cause a hang or frequently repeatable crash (complete DOS). The vulnerability is easily exploitable.
- CVE-2026-83278Medium
Vulnerability in the Helidon product (component: helidon-integrations-neo4j), affecting versions 3.0.0-3.2.20 and 4.0.0-4.5.4. A difficult-to-exploit vulnerability allows an unauthenticated attacker with access to the physical communication segment to gain unauthorized creation, deletion, or modification access to critical data and unauthorized access to data.
- CVE-2026-83276High
Vulnerability in Oracle Fusion Middleware Helidon product (helidon-webclient-http2 component) affects versions 4.0.0-4.5.4. An unauthenticated attacker with network access via HTTP/2 can cause a hang or frequently repeatable crash (complete DOS). The vulnerability is easily exploitable.
- CVE-2026-83231High
Vulnerability in Oracle Fusion Middleware Helidon (component: helidon-dbclient-mongodb) affecting versions 3.0.0-3.2.20 and 4.0.0-4.5.4. A difficult-to-exploit attack via HTTP can lead to unauthorized data access, data modification, and partial denial of service. CVSS 3.1 Base Score 7.0.
- CVE-2026-73939High
Vulnerability in Oracle Fusion Middleware Helidon (Imperative Web Server) versions 3.0.0-3.2.19. An unauthenticated attacker via HTTP can gain unauthorized access to critical data and the ability to create, delete, or modify it, with potential impact on additional products.
- CVE-2026-73938High
Vulnerability in Oracle Fusion Middleware Helidon product (component: Imperative Web Server) affecting versions 4.0.0-4.4.1. Easily exploitable by unauthenticated attacker with network access via HTTP, allowing unauthorized access to critical data or complete access to all Helidon accessible data. CVSS 7.5 (Confidentiality impact).
- CVE-2026-73937High
Vulnerability in Oracle Fusion Middleware Helidon (Imperative Web Server) versions 4.0.0-4.4.1. An unauthenticated attacker via HTTP/2 can cause a hang or frequently repeatable crash (complete DoS) and unauthorized read access to a subset of Helidon accessible data.
- CVE-2026-73936High
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server) in versions 4.0.0-4.5.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to cause a hang or frequently repeatable crash (complete DoS) of Helidon. CVSS 3.1 Base Score 7.5 (Availability impacts).
- CVE-2026-73935High
Vulnerability in Oracle Fusion Middleware Helidon product (component: Imperative Web Server) affecting versions 4.0.0-4.5.0. Easily exploitable by unauthenticated attacker with network access via HTTP/2, leading to hang or frequent crashes (complete DoS) of Helidon. CVSS 7.5 (Availability impact).
- CVE-2026-73934High
Vulnerability in Oracle Fusion Middleware Helidon product (component: Imperative Web Server) affecting versions 3.0.0-3.2.18. Easily exploitable by unauthenticated attacker with network access via HTTP/2, leading to hang or frequent crashes (complete DoS) of Helidon. CVSS 7.5 (Availability impact).
- CVE-2026-73933High
Vulnerability in Oracle Fusion Middleware Helidon (Imperative Web Server) versions 4.0.0-4.5.2. Easily exploitable by unauthenticated attacker with network access via HTTP, can lead to unauthorized update, insert, delete, read access, and partial denial of service.
- CVE-2026-73932Medium
Vulnerability in Oracle Fusion Middleware Helidon product (component: Imperative Web Server) in versions 4.0.0-4.5.2. Easily exploitable flaw allows unauthenticated attacker with network access via HTTP to cause a partial denial of service (partial DoS) of Helidon. CVSS 5.3 (Availability impact).
- CVE-2026-73931High
Vulnerability in Oracle Fusion Middleware Helidon product (component: Imperative Web Server) affecting versions 4.0.0-4.5.2. Easily exploitable by an unauthenticated attacker with network access via HTTP, may significantly impact additional products (scope change). Allows unauthorized update, insert, or delete of some data, unauthorized read access to a subset, and partial denial of service. CVSS 3.1 Base Score 8.3 (Confidentiality, Integrity, Availability impacts).
- CVE-2026-73929High
Vulnerability in Oracle Fusion Middleware Helidon product (component: Imperative Web Server) affecting versions 4.0.0-4.5.2. Easily exploitable by an unauthenticated attacker with network access via HTTP, may significantly impact additional products (scope change). Allows unauthorized update, insert, or delete of some data, unauthorized read access to a subset, and partial denial of service. CVSS 3.1 Base Score 8.3 (Confidentiality, Integrity, Availability impacts).
- CVE-2026-73928High
Vulnerability in Oracle Fusion Middleware Helidon product (component: Imperative Web Server) in versions 4.0.0-4.5.2. Easily exploitable by unauthenticated attacker via network HTTP, can lead to unauthorized update, insert or delete access to some data and unauthorized read access to a subset of data. Attacks may significantly impact additional products (scope change). CVSS 3.1 Base Score 7.2 (Confidentiality and Integrity impacts).
- CVE-2026-73927High
Vulnerability in Oracle Fusion Middleware Helidon product (component: Imperative Web Server) affecting versions 3.0.0-3.2.19. Easily exploitable by unauthenticated attacker with network access via HTTP, leading to hang or frequent crashes (complete DoS) of Helidon. CVSS 7.5 (Availability impact).
- CVE-2026-73925High
Vulnerability in Oracle Fusion Middleware Helidon product (component: Imperative Web Server) affecting versions 1.0.0-1.4.18. Easily exploitable by an unauthenticated attacker with network access via HTTP, allowing unauthorized creation, deletion, or modification of critical data or all Helidon data, as well as unauthorized read access to a subset of data. CVSS 3.1 Base Score 8.2 (Confidentiality and Integrity impacts).
- CVE-2026-73923Low
Vulnerability in Oracle Fusion Middleware's Helidon product (component: Imperative Web Server) in versions 1.0.0-1.4.19. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon, resulting in unauthorized update, insert or delete access to some of Helidon accessible data. CVSS 3.1 Base Score 3.7 (Integrity impacts).
- CVE-2026-73919Medium
Vulnerability in Oracle Fusion Middleware Helidon product (component: Imperative Web Server) affecting versions 3.0.0-3.2.17. A low privileged attacker with network access via HTTP can exploit this. Successful attacks can result in unauthorized update, insert, or delete access to some Helidon accessible data, as well as unauthorized read access to a subset of that data. CVSS 3.1 Base Score 5.4 (Confidentiality and Integrity impacts).
- CVE-2026-73918High
Vulnerability in Oracle Fusion Middleware Helidon product (component: Imperative Web Server) in versions 4.0.0-4.4.1. Easily exploitable by unauthenticated attacker via network HTTP, can lead to unauthorized update, insert or delete access to some data, unauthorized read access to a subset of data, and partial denial of service. CVSS 3.1 Base Score 7.3 (Confidentiality, Integrity and Availability impacts).
- CVE-2026-73915High
Vulnerability in Oracle Fusion Middleware Helidon product (component: Imperative Web Server) in versions 4.0.0-4.4.1. Easily exploitable by unauthenticated attacker via network HTTP, can cause hang or frequent crashes (complete DoS) of Helidon. CVSS 3.1 Base Score 7.5 (Availability impact).
- CVE-2026-73914Medium
Vulnerability in Oracle Fusion Middleware Helidon product (component: Imperative Web Server) in versions 4.0.0-4.4.1. Easily exploitable flaw allows unauthenticated attacker with network access via HTTP to gain unauthorized read access to a subset of Helidon accessible data and cause a partial denial of service (partial DoS) of Helidon. CVSS 6.5 (Confidentiality and Availability impacts).
- CVE-2026-73913Medium
Vulnerability in Oracle Fusion Middleware Helidon product (component: Imperative Web Server) affecting versions 4.0.0-4.4.1. A low privileged attacker with network access via HTTP can exploit this. Successful attacks can result in unauthorized update, insert, or delete access to some Helidon accessible data, as well as unauthorized read access to a subset of that data. CVSS 3.1 Base Score 5.4 (Confidentiality and Integrity impacts).
- CVE-2026-73911Medium
Vulnerability in Oracle Fusion Middleware Helidon product (component: Imperative Web Server) affects versions 4.0.0-4.4.1. It is easily exploitable, allowing a low privileged attacker with network access via HTTP to compromise Helidon. Successful attacks can result in unauthorized update, insert, or delete access to some Helidon accessible data as well as unauthorized read access to a subset of Helidon accessible data.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

