---
id: "CVE-2026-91414"
kind: "vulnerability"
aliases: ["CVE-2026-91414"]
title: "Oracle Siebel CRM Deployment: unauthenticated HTTP flaw exposes critical data"
severity: "medium"
cvss: 5.3
epss: 0.00284
exploited: false
status: "open"
category: "vendor"
products: []
ecosystems: []
tags: ["enterprise-crm", "oracle", "self-hosted", "siebel-crm", "vendor"]
not_affected_if: ["unsupported-version-outside-range"]
published_at: "2026-10-20T22:20:44+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-2026-91414", "first_seen_at": "2026-10-23T21:57:26+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-91414", "first_seen_at": "2026-10-25T12:38:52+00:00"}]
---

# Oracle Siebel CRM Deployment: unauthenticated HTTP flaw exposes critical data

Oracle Siebel CRM Deployment has a flaw in its Server Infrastructure component, affecting supported versions 17.0 through 26.9. A remote attacker with network access over HTTP and no account can gain unauthorized access to data the deployment holds, but only if a person other than the attacker takes an action.

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

## How to check

- Identify Siebel CRM Deployment installs and their versions for the 17.0 to 26.9 range
- unknown

## Fix

- Apply the Oracle Critical Patch Update fix for Siebel CRM Deployment (version not stated in the sources)
- unknown

## Timeline

- 2026-10-23T21:57:26+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-91414
- 2026-10-25T12:38:52+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-91414

## From the sources

Vulnerability in the Siebel CRM Deployment product of Oracle Siebel CRM (component: Server Infrastructure).  Supported versions that are affected are 17.0-26.9. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise Siebel CRM Deployment.  Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in  unauthorized access to critical data or complete access to all Siebel CRM Deployment accessible data. CVSS 3.1 Base Score 5.3 (Confidentiality impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N).

---

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