---
id: "CVE-2026-91371"
kind: "vulnerability"
aliases: ["CVE-2026-91371"]
title: "Oracle Siebel CRM Cloud: unauthenticated read access to some CRM data"
severity: "medium"
cvss: 5.8
epss: 0.00316
exploited: false
status: "open"
category: "vendor"
products: []
ecosystems: []
tags: ["oracle-cloud", "siebel-crm", "vendor"]
not_affected_if: []
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-2026-91371", "first_seen_at": "2026-10-23T21:57:26+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-91371", "first_seen_at": "2026-10-25T12:38:52+00:00"}]
---

# Oracle Siebel CRM Cloud: unauthenticated read access to some CRM data

Oracle Siebel CRM Cloud Applications versions 22.3 through 26.9 have a flaw in the Siebel Cloud Manager component that can be reached over HTTP. An unauthenticated attacker with network access can read a subset of the data the CRM application can access.

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

## Timeline

- 2026-10-23T21:57:26+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-91371
- 2026-10-25T12:38:52+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-91371

## From the sources

Vulnerability in the Siebel CRM Cloud Applications product of Oracle Siebel CRM (component: Siebel Cloud Manager).  Supported versions that are affected are 22.3-26.9. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Siebel CRM Cloud Applications.  While the vulnerability is in Siebel CRM Cloud Applications, attacks may significantly impact additional products (scope change).  Successful attacks of this vulnerability can result in  unauthorized read access to a subset of Siebel CRM Cloud Applications accessible data. CVSS 3.1 Base Score 5.8 (Confidentiality impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/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_