---
id: "CVE-2026-91369"
kind: "vulnerability"
aliases: ["CVE-2026-91369"]
title: "Oracle Siebel CRM Cloud: low-privilege users can alter critical data"
severity: "medium"
cvss: 5.3
epss: 0.0023
exploited: false
status: "open"
category: "vendor"
products: []
ecosystems: []
tags: ["cloud", "crm", "oracle", "siebel", "vendor"]
not_affected_if: ["not-using-siebel-cloud"]
published_at: "2026-10-20T22:20:39+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-2026-91369", "first_seen_at": "2026-10-23T21:57:26+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-91369", "first_seen_at": "2026-10-25T12:38:52+00:00"}]
---

# Oracle Siebel CRM Cloud: low-privilege users can alter critical data

Oracle Siebel CRM Cloud Applications, in the Siebel Cloud Manager component, has a flaw that lets a low-privileged user reached over HTTP create, delete or modify data. The sources say the attack is hard to pull off and affects integrity, not confidentiality or availability.

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

## How to check

- Check whether your Siebel CRM Cloud Applications version falls within 22.3 to 26.9 in Oracle's advisory or with your Oracle account contact
- unknown for any local command, since the sources do not describe one

## Fix

- Apply the Oracle Siebel CRM Cloud Applications patch or update for the affected release, as listed in Oracle's Critical Patch Update
- unknown for the exact patched version, since the sources do not name it

## Timeline

- 2026-10-23T21:57:26+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-91369
- 2026-10-25T12:38:52+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-91369

## 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. Difficult to exploit vulnerability allows low privileged attacker with network access via HTTP to compromise Siebel CRM Cloud Applications.  Successful attacks of this vulnerability can result in  unauthorized creation, deletion or modification access to critical data or all Siebel CRM Cloud Applications accessible data. CVSS 3.1 Base Score 5.3 (Integrity impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/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_