---
id: "CVE-2026-91448"
kind: "vulnerability"
aliases: ["CVE-2026-91448"]
title: "Oracle Siebel CRM Deployment: unauthenticated HTTP flaw exposes critical data"
severity: "high"
cvss: 7.5
epss: 0.00398
exploited: false
status: "open"
category: "vendor"
products: []
ecosystems: []
tags: ["enterprise-crm", "oracle", "self-hosted", "siebel-crm", "vendor"]
not_affected_if: ["no-network-http-exposure", "unsupported-version"]
published_at: "2026-10-20T22:20:48+00:00"
first_seen_at: "2026-10-23T21:57:27+00:00"
updated_at: "2026-10-25T12:38:52+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-91448", "first_seen_at": "2026-10-23T21:57:27+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-91448", "first_seen_at": "2026-10-25T12:38:52+00:00"}]
---

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

Oracle Siebel CRM Deployment's Server Infrastructure component has a flaw that lets an unauthenticated attacker reach it over HTTP from the network. A successful attack gives unauthorized access to critical data or all data the deployment can reach.

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

## How to check

- Identify Siebel CRM Deployment versions in use and compare against the affected range `17.0` to `26.9`
- Check the Oracle Critical Patch Update advisory for the Siebel CRM release you run

## Fix

- Apply the Oracle Siebel CRM patch for your release, as listed in the Oracle security advisory (version unknown from sources)
- Restrict HTTP access to Siebel server infrastructure until patched

## Timeline

- 2026-10-23T21:57:27+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-91448
- 2026-10-25T12:38:52+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-91448

## 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. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Siebel CRM Deployment.  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 7.5 (Confidentiality impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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_