How severe is CVE-2026-83458?

CVE-2026-83458 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-83458 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-83458?

CVE-2026-83458 affects Oracle Helidon. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-83458?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-83458 published?

CVE-2026-83458 was published on 2026-09-15 and last updated on 2026-09-28.

CVE-2026-83458

CVE-2026-83458 is a medium-severity vulnerability in Oracle Helidon with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Oracle Helidon
Published: 2026-09-15
Last modified: 2026-09-28

Description

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: JSON). Supported versions that are affected are 4.0.0-4.5.4. 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 partial denial of service (partial DOS) of Helidon. CVSS 3.1 Base Score 5.3 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

Frequently asked questions

What is CVE-2026-83458?: Vulnerability in the Helidon product of Oracle Fusion Middleware (component: JSON). Supported versions that are affected are 4.0.0-4.5.4. 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 partial denial of service (partial DOS) of Helidon. CVSS 3.1 Base Score 5.3 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).
How severe is CVE-2026-83458?: CVE-2026-83458 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-83458 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-83458?: CVE-2026-83458 affects Oracle Helidon. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-83458?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-83458 published?: CVE-2026-83458 was published on 2026-09-15 and last updated on 2026-09-28.

References

https://www.oracle.com/security-alerts/cspusep2026.html

Affected products (1)

cpe:2.3:a:oracle:helidon:*:*:*:*:*:*:*:*

More vulnerabilities in Oracle Helidon

CVE-2026-73930 — Critical (CVSS 9.9): Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported…
CVE-2026-73921 — Critical (CVSS 9.8): Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported…
CVE-2026-73912 — Critical (CVSS 9.8): Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported…
CVE-2026-73905 — Critical (CVSS 9.8): Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported…
CVE-2026-71164 — Critical (CVSS 9.8): Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported…
CVE-2026-71152 — Critical (CVSS 9.8): Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported…

All CVEs affecting Oracle Helidon →

Other CWE-400 (Uncontrolled Resource Consumption) vulnerabilities

CVE-2026-46775 — Critical (CVSS 9.9): Vulnerability in Oracle REST Data Services (component: Core). Supported versions that are affected are 24.2.0-26.1.0.…
CVE-2025-61303 — Critical (CVSS 9.8): Hatching Triage Sandbox Windows 10 build 2004 (2025-08-14) and Windows 10 LTSC 2021(2025-08-14) contains a…
CVE-2025-43193 — Critical (CVSS 9.8): The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.6, macOS Sonoma 14.7.7,…
CVE-2025-24269 — Critical (CVSS 9.8): The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.4. An app may be able to…
CVE-2025-24264 — Critical (CVSS 9.8): The issue was addressed with improved memory handling. This issue is fixed in Safari 18.4, iOS 18.4 and iPadOS 18.4,…
CVE-2025-24260 — Critical (CVSS 9.8): The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.4, macOS Sonoma 14.7.5,…

Browse all CWE-400 (Uncontrolled Resource Consumption) vulnerabilities →