---
id: "CVE-2026-87339"
kind: "vulnerability"
aliases: ["CVE-2026-87339"]
title: "Oracle Siebel CRM Integration REST flaw leaks a subset of data"
severity: "low"
cvss: 3.1
epss: null
exploited: false
status: "open"
category: "vendor"
products: []
ecosystems: []
tags: ["oracle", "self-hosted", "siebel-crm", "vendor"]
not_affected_if: ["not-siebel-crm"]
published_at: "2026-10-20T22:20:11+00:00"
first_seen_at: "2026-10-23T21:57:25+00:00"
updated_at: "2026-10-25T04:47:36+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-87339", "first_seen_at": "2026-10-23T21:57:25+00:00"}]
---

# Oracle Siebel CRM Integration REST flaw leaks a subset of data

Oracle Siebel CRM Integration's REST component has a flaw that lets an unauthenticated remote attacker read a subset of the data the integration can access. Exploitation needs a victim to take an action, and the CVSS score is 3.1 (low), with only confidentiality affected.

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

## How to check

- unknown

## Fix

- unknown

## Timeline

- 2026-10-23T21:57:25+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-87339

## From the sources

Vulnerability in the Siebel CRM Integration product of Oracle Siebel CRM (component: REST).  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 Integration.  Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in  unauthorized read access to a subset of Siebel CRM Integration accessible data. CVSS 3.1 Base Score 3.1 (Confidentiality impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/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_