---
id: "CVE-2026-91441"
kind: "vulnerability"
aliases: ["CVE-2026-91441"]
title: "Oracle Siebel Order Management: low-privilege HTTP flaw allows data changes and reads"
severity: "medium"
cvss: 6.5
epss: 0.00192
exploited: false
status: "open"
category: "vendor"
products: []
ecosystems: []
tags: ["crm", "enterprise", "oracle", "order-management", "siebel", "vendor"]
not_affected_if: ["not-siebel", "outside-affected-versions"]
published_at: "2026-10-20T22:20:47+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-2026-91441", "first_seen_at": "2026-10-23T21:57:26+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-91441", "first_seen_at": "2026-10-25T12:38:52+00:00"}]
---

# Oracle Siebel Order Management: low-privilege HTTP flaw allows data changes and reads

Oracle Siebel CRM's Customer Order Management component, versions 17.0 through 26.9, has a flaw reachable over HTTP by a low-privileged user. A successful attack, which needs a second person to interact, can read, change or delete some accessible order data and partly disrupt the service.

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

## How to check

- Confirm the installed Siebel Customer Order Management release and compare it with the affected range 17.0-26.9
- Check whether Oracle's patch or security alert for this CVE is listed for your Siebel release

## Fix

- Apply the Oracle Siebel CRM patch for Customer Order Management that covers this CVE (patch identifier unknown in the sources)
- Check the Oracle Critical Patch Update advisory for the fixed release

## Timeline

- 2026-10-23T21:57:26+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-91441
- 2026-10-25T12:38:52+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-91441

## From the sources

Vulnerability in the Siebel Apps - Customer Order Management product of Oracle Siebel CRM (component: Order Management).  Supported versions that are affected are 17.0-26.9. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Siebel Apps - Customer Order Management.  Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Siebel Apps - Customer Order Management, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in  unauthorized update, insert or delete access to some of Siebel Apps - Customer Order Management accessible data as well as  unauthorized read access to a subset of Siebel Apps - Customer Order Management accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Siebel Apps - Customer Order Management. CVSS 3.1 Base Score 6.5 (Confidentiality, Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L).

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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_