Insecure Direct Object Reference in Fat Free CRM Affects User Comment Management
CVE-2026-113600

5.3MEDIUM

Key Information:

Vendor

Fatfreecrm

Status
Fat Free Crm
Vendor
CVE Published:
20 October 2026

What is CVE-2026-113600?

Fat Free CRM versions prior to 0.26.0 have an insecure direct object reference vulnerability, allowing authenticated users to alter or delete comments of other users. This occurs as the CommentsController's update and destroy actions lack proper authorization checks when accessing comments through unscoped identifiers. Malicious users can exploit this vulnerability by sending PUT or DELETE requests to the endpoint /comments/:id, where sequential IDs can be used to manipulate comments related to contacts, accounts, leads, and opportunities belonging to different users.

Affected Version(s)

fat_free_crm 0 < 0.26.0

References

https://github.com/fatfreecrm/fat_free_crm/issues/1650
issue-tracking
https://github.com/fatfreecrm/fat_free_crm/commit/3c31993...
patch
https://github.com/fatfreecrm/fat_free_crm/releases/tag/v...
release-notes

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

lighthousekeeper1212
leediay153 from Viettel Post
.