Vulnerability in the Oracle WebCenter Portal product of Oracle Fusion Middleware (component: Composer). (CVE-2026-83039)
A critical vulnerability (CVE-2026-83039) exists in Oracle WebCenter Portal component Composer of Oracle Fusion Middleware versions 12.2.1.4.0 and 14.1.2.0.0. This vulnerability allows a low-privileged attacker with network access via HTTP to potentially take over the Oracle WebCenter Portal, impacting confidentiality, integrity, and availability. The vulnerability has a CVSS 3.1 base score of 9.9. Oracle has released security patches addressing this and many other vulnerabilities in their September 2026 Critical Security Patch Update.
AI Analysis
Technical Summary
CVE-2026-83039 is a critical vulnerability in Oracle WebCenter Portal's Composer component affecting versions 12.2.1.4.0 and 14.1.2.0.0. It allows a low-privileged attacker with network access over HTTP to compromise the portal, resulting in complete takeover. The vulnerability impacts confidentiality, integrity, and availability, with a CVSS 3.1 score of 9.9 and vector AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H. Oracle’s September 2026 Critical Security Patch Update includes patches for this vulnerability. Oracle strongly recommends applying these patches promptly to mitigate exploitation risks.
Potential Impact
Successful exploitation can lead to full compromise of Oracle WebCenter Portal, including takeover of the portal with complete confidentiality, integrity, and availability impacts. The vulnerability also has potential to affect additional Oracle products due to scope change. The CVSS score of 9.9 reflects the critical nature of this vulnerability.
Mitigation Recommendations
Oracle has released patches for this vulnerability as part of the September 2026 Critical Security Patch Update. Customers should apply the relevant patches for Oracle WebCenter Portal versions 12.2.1.4.0 and 14.1.2.0.0 without delay. Oracle strongly recommends staying on actively supported versions and promptly applying security patches to prevent exploitation. No additional mitigations are specified beyond patching.
Vulnerability in the Oracle WebCenter Portal product of Oracle Fusion Middleware (component: Composer). (CVE-2026-83039)
Description
A critical vulnerability (CVE-2026-83039) exists in Oracle WebCenter Portal component Composer of Oracle Fusion Middleware versions 12.2.1.4.0 and 14.1.2.0.0. This vulnerability allows a low-privileged attacker with network access via HTTP to potentially take over the Oracle WebCenter Portal, impacting confidentiality, integrity, and availability. The vulnerability has a CVSS 3.1 base score of 9.9. Oracle has released security patches addressing this and many other vulnerabilities in their September 2026 Critical Security Patch Update.
CVSS v3.1
Score 9.9critical
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-83039 is a critical vulnerability in Oracle WebCenter Portal's Composer component affecting versions 12.2.1.4.0 and 14.1.2.0.0. It allows a low-privileged attacker with network access over HTTP to compromise the portal, resulting in complete takeover. The vulnerability impacts confidentiality, integrity, and availability, with a CVSS 3.1 score of 9.9 and vector AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H. Oracle’s September 2026 Critical Security Patch Update includes patches for this vulnerability. Oracle strongly recommends applying these patches promptly to mitigate exploitation risks.
Potential Impact
Successful exploitation can lead to full compromise of Oracle WebCenter Portal, including takeover of the portal with complete confidentiality, integrity, and availability impacts. The vulnerability also has potential to affect additional Oracle products due to scope change. The CVSS score of 9.9 reflects the critical nature of this vulnerability.
Mitigation Recommendations
Oracle has released patches for this vulnerability as part of the September 2026 Critical Security Patch Update. Customers should apply the relevant patches for Oracle WebCenter Portal versions 12.2.1.4.0 and 14.1.2.0.0 without delay. Oracle strongly recommends staying on actively supported versions and promptly applying security patches to prevent exploitation. No additional mitigations are specified beyond patching.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-5xvv-9w25-q3fw
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-83039"]
- Database Specific Severity
- CRITICAL
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aaa07e355bf5e2cf5ea33ca
Added to database: 09/16/2026, 03:07:15 UTC
Last enriched: 09/16/2026, 04:39:24 UTC
Last updated: 09/16/2026, 06:01:22 UTC
Views: 1
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