CVE-2026-83142 is a vulnerability in the Oracle Proposals product of Oracle E-Business Suite (component: Internal Operations) affecting versions 12.2.3 through 12.2.15. It allows a low privileged attacker with network access via HTTP to compromise Oracle Proposals, resulting in unauthorized access to critical data. The vulnerability has a CVSS 3.1 base score of 7.7 with vector AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N, indicating network attack vector, low attack complexity, low privileges required, no user interaction, scope change, high confidentiality impact, no integrity or availability impact. Oracle’s September 2026 Critical Security Patch Update includes fixes for this vulnerability as part of a broader set of 673 security patches. Oracle strongly recommends applying these patches promptly to mitigate exploitation risks.

Successful exploitation of this vulnerability can lead to unauthorized access to critical data within Oracle Proposals. The vulnerability affects confidentiality but does not impact integrity or availability. Due to scope change, attacks may also significantly impact additional Oracle E-Business Suite products beyond Oracle Proposals.

Oracle has released a fix for this vulnerability in the September 2026 Critical Security Patch Update. Customers are strongly advised to apply the relevant security patches without delay to remediate this vulnerability. Oracle recommends remaining on actively-supported versions and promptly applying all security updates. No additional mitigation steps are indicated beyond patching.