---
id: "CVE-2026-91376"
kind: "vulnerability"
aliases: ["CVE-2026-91376"]
title: "Oracle Primavera P6 Web Access flaw exposes project data to low-privilege users"
severity: "medium"
cvss: 6.5
epss: 0.00159
exploited: false
status: "open"
category: "vendor"
products: []
ecosystems: []
tags: ["enterprise-apps", "oracle", "primavera-p6", "vendor", "web-access"]
not_affected_if: ["managed-hosting", "no-web-access-component"]
published_at: "2026-10-20T22:20:40+00:00"
first_seen_at: "2026-10-23T21:57:26+00:00"
updated_at: "2026-10-25T12:38:52+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-91376", "first_seen_at": "2026-10-23T21:57:26+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-91376", "first_seen_at": "2026-10-25T12:38:52+00:00"}]
---

# Oracle Primavera P6 Web Access flaw exposes project data to low-privilege users

Oracle Primavera P6 Enterprise Project Portfolio Management has a flaw in its Web Access component that a low-privileged user can trigger over HTTP. A successful attack can read critical project data and change or delete some of it, and can affect other products.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Primavera P6 Enterprise Project Portfolio Management version against the affected ranges: `21.12.0.0-21.12.21.9`, `22.12.0.0-22.12.21.4`, `23.12.0-23.12.20`, `24.12.0-24.12.16`, `25.12.0-25.12.8`
- Confirm whether the Web Access component is deployed and reachable over HTTP

## Fix

- Move Primavera P6 Enterprise Project Portfolio Management to a release patched by Oracle's Critical Patch Update for this CVE (the sources do not name the fixed build; unknown)

## Timeline

- 2026-10-23T21:57:26+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-91376
- 2026-10-25T12:38:52+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-91376

## From the sources

Vulnerability in the Primavera P6 Enterprise Project Portfolio Management product of Oracle Construction and Engineering (component: Web Access).  Supported versions that are affected are 21.12.0.0-21.12.21.9, 22.12.0.0-22.12.21.4, 23.12.0-23.12.20, 24.12.0-24.12.16 and 25.12.0-25.12.8. Difficult to exploit vulnerability allows low privileged attacker with network access via HTTP to compromise Primavera P6 Enterprise Project Portfolio Management.  Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Primavera P6 Enterprise Project Portfolio Management, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in  unauthorized access to critical data or complete access to all Primavera P6 Enterprise Project Portfolio Management accessible data as well as  unauthorized update, insert or delete access to some of Primavera P6 Enterprise Project Portfolio Management accessible data. CVSS 3.1 Base Score 6.5 (Confidentiality and Integrity impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N).

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_