CVE-2026-73866
published 2026-08-18CVE-2026-73866: Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported versions that are affected are 4.0.0-4.4.1…
PriorityP263critical9.1CVSS 3.1
AVNACLPRNUINSUCHIHAN
EPSS
0.40%
32.7th percentile
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported versions that are affected are 4.0.0-4.4.1. 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 as well as unauthorized access to critical data or complete access to all Helidon accessible data. CVSS 3.1 Base Score 9.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N).
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| oracle | helidon | — | — |
| oracle_corporation | helidon | 4.0.0 – 4.4.1 | — |
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
VulDB
Oracle Helidon 4.5.0 Imperative Web Server improper authorization
vuldb·2026-08-19·CVSS 9.1
CVE-2026-73866 [CRITICAL] Oracle Helidon 4.5.0 Imperative Web Server improper authorization
A vulnerability labeled as critical has been found in Oracle Helidon 4.5.0. This issue affects some unknown processing of the component Imperative Web Server. Executing a manipulation can lead to improper authorization.
The identification of this vulnerability is CVE-2026-73866. The attack may be launched remotely. There is no exploit available.
GHSA
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server).
ghsa_unreviewed·2026-08-18
CVE-2026-73866 [CRITICAL] CWE-284 Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server).
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). The supported version that is affected is 4.5.0. 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 as well as unauthorized access to critical data or complete access to all Helidon accessible data. CVSS 3.1 Base Score 9.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N).
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-08-18
Published