---
id: CVE-2026-113600
title: Fat Free CRM before 0.26.0 IDOR via CommentsController update and destroy
summary: >-
  Fat Free CRM before 0.26.0 contains an insecure direct object reference
  vulnerability that allows authenticated users to modify or delete other users'
  comments because CommentsController#update and #destroy use an unscoped
  Comment.find w…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L'
cvssSource: cna
cwe:
  - CWE-639
vendor: fatfreecrm
product: fat_free_crm
affected:
  - fat_free_crm < 0.26.0
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T15:40:28.303Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-113600'
references:
  - url: 'https://github.com/fatfreecrm/fat_free_crm/issues/1650'
  - url: >-
      https://github.com/fatfreecrm/fat_free_crm/commit/3c3199328dd10414b1f039ab8e4a82fe0f3baf87
  - url: 'https://github.com/fatfreecrm/fat_free_crm/releases/tag/v0.26.0'
    label: fat_free_crm v0.26.0 Release Notes
  - url: >-
      https://github.com/fatfreecrm/fat_free_crm/blob/v0.25.0/app/controllers/comments_controller.rb
  - url: >-
      https://www.vulncheck.com/advisories/fat-free-crm-before-0.26.0-idor-via-commentscontroller-update-and-destroy
    label: >-
      VulnCheck Advisory: Fat Free CRM before 0.26.0 IDOR via CommentsController
      update and destroy
tags:
  - cve.org
ingestedAt: '2026-10-20T16:10:53.304Z'
---

## Overview

Fat Free CRM before 0.26.0 contains an insecure direct object reference vulnerability that allows authenticated users to modify or delete other users' comments because CommentsController#update and #destroy use an unscoped Comment.find without authorization checks. Attackers can send PUT or DELETE requests to /comments/:id with enumerable sequential IDs to edit or delete comments on contacts, accounts, leads, and opportunities owned by others.

## Affected

- `fat_free_crm < 0.26.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.