Vulnerability in the Helidon product of Oracle Fusion Middleware (component: JSON). (CVE-2026-83458)
A vulnerability in the JSON component of Oracle Fusion Middleware's Helidon product affects versions 4.0.0 through 4.5.4. This vulnerability allows an unauthenticated attacker with network access via HTTP to cause a partial denial of service (DoS) condition. The CVSS 3.1 base score is 5.3, indicating a medium severity with impact limited to availability. Oracle has released security patches addressing this vulnerability as part of their September 2026 Critical Security Patch Update.
AI Analysis
Technical Summary
CVE-2026-83458 is a vulnerability in the Helidon product of Oracle Fusion Middleware, specifically in the JSON component. It affects supported versions 4.0.0 through 4.5.4. The flaw allows an unauthenticated attacker with network access via HTTP to cause a partial denial of service on the Helidon service. The CVSS 3.1 vector is AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L, indicating network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability. Oracle has included fixes for this vulnerability in their September 2026 Critical Security Patch Update, which contains 673 security patches across multiple products including Helidon.
Potential Impact
Successful exploitation of this vulnerability can result in a partial denial of service of the Helidon product, impacting availability. There is no confidentiality or integrity impact. The vulnerability is exploitable remotely without authentication.
Mitigation Recommendations
Oracle has released security patches for this vulnerability in the September 2026 Critical Security Patch Update. Customers are strongly advised to apply the available patches promptly to remediate this issue. Remaining on actively-supported versions and applying Oracle patches without delay is recommended. No additional mitigation steps are specified beyond patching.
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: JSON). (CVE-2026-83458)
Description
A vulnerability in the JSON component of Oracle Fusion Middleware's Helidon product affects versions 4.0.0 through 4.5.4. This vulnerability allows an unauthenticated attacker with network access via HTTP to cause a partial denial of service (DoS) condition. The CVSS 3.1 base score is 5.3, indicating a medium severity with impact limited to availability. Oracle has released security patches addressing this vulnerability as part of their September 2026 Critical Security Patch Update.
CVSS v3.1
Score 5.3medium
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-83458 is a vulnerability in the Helidon product of Oracle Fusion Middleware, specifically in the JSON component. It affects supported versions 4.0.0 through 4.5.4. The flaw allows an unauthenticated attacker with network access via HTTP to cause a partial denial of service on the Helidon service. The CVSS 3.1 vector is AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L, indicating network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability. Oracle has included fixes for this vulnerability in their September 2026 Critical Security Patch Update, which contains 673 security patches across multiple products including Helidon.
Potential Impact
Successful exploitation of this vulnerability can result in a partial denial of service of the Helidon product, impacting availability. There is no confidentiality or integrity impact. The vulnerability is exploitable remotely without authentication.
Mitigation Recommendations
Oracle has released security patches for this vulnerability in the September 2026 Critical Security Patch Update. Customers are strongly advised to apply the available patches promptly to remediate this issue. Remaining on actively-supported versions and applying Oracle patches without delay is recommended. No additional mitigation steps are specified beyond patching.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-854f-g5gq-5x2g
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-83458"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aaa07db55bf5e2cf5ea325a
Added to database: 09/16/2026, 03:07:07 UTC
Last enriched: 09/16/2026, 03:47:08 UTC
Last updated: 09/16/2026, 04:01:23 UTC
Views: 2
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