---
id: "CVE-2026-91361"
kind: "vulnerability"
aliases: ["CVE-2026-91361"]
title: "Oracle Siebel CRM Cloud: unauthenticated HTTP flaw allows limited data changes"
severity: "medium"
cvss: 5.3
epss: 0.00214
exploited: false
status: "open"
category: "vendor"
products: []
ecosystems: []
tags: ["hosted-saas", "oracle", "siebel-crm", "vendor"]
not_affected_if: []
published_at: "2026-10-20T22:20:38+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-2026-91361", "first_seen_at": "2026-10-23T21:57:26+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-91361", "first_seen_at": "2026-10-25T12:38:52+00:00"}]
---

# Oracle Siebel CRM Cloud: unauthenticated HTTP flaw allows limited data changes

Oracle Siebel CRM Cloud Applications, through the Siebel Cloud Manager component, has a flaw that an unauthenticated attacker can reach over the network via HTTP. A successful attack can make unauthorized update, insert or delete changes to some accessible CRM data.

_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-2026-91361
- 2026-10-25T12:38:52+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-91361

## 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.  Successful attacks of this vulnerability can result in  unauthorized update, insert or delete access to some of Siebel CRM Cloud Applications accessible data. CVSS 3.1 Base Score 5.3 (Integrity impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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_