CVE-2026-44633 HIGH

CVE-2026-44633: Live Helper Chat: REST API chat update accepts arbitrary chat fields across department boundaries

Vendor Livehelperchat
Product livehelperchat
Weakness CWE-863 · Incorrect authorization
Published May 14, 2026
Last update May 14, 2026
View on NVD All CVEs

CVSS base score

8.1/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

What the vulnerability does

01Description

Live Helper Chat is an open-source application that enables live support websites. In 4.84v, the Live Helper Chat REST API chat update endpoint allows a REST user with lhchat/use to update a chat in a department they cannot read. The endpoint accepts arbitrary chat object fields, so the user can change the chat hash and status and then access or tamper with the chat through visitor/widget paths. The same write primitive can set operation_admin, which is later emitted as operator-side JavaScript.

Key dates

02Disclosure timeline

May 14, 2026 CVE published
May 14, 2026 Record updated