---
id: CVE-2026-74869
title: >-
  stoatchat before 0.15.0 contains a missing authorization vulnerability in the
  Subscribe message handler that allows authenticated attackers to enumerate
  members and monitor profile updates of private servers without membership
summary: >-
  stoatchat before 0.15.0 contains a missing authorization vulnerability in the
  Subscribe message handler that allows authenticated attackers to enumerate
  members and monitor profile updates of private servers without membership.
  Attackers…
severity: high
cvss: 7.7
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N'
cwe:
  - CWE-862
published: '2026-08-17'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T20:06:30.133'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74869'
references:
  - url: >-
      https://github.com/stoatchat/stoatchat/security/advisories/GHSA-jj3j-9qr7-jgfc
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/stoatchat-before-missing-authorization-via-subscribe
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00354
epssPercentile: 0.26299
ingestedAt: '2026-09-24T20:51:40.204Z'
---

## Overview

stoatchat before 0.15.0 contains a missing authorization vulnerability in the Subscribe message handler that allows authenticated attackers to enumerate members and monitor profile updates of private servers without membership. Attackers can subscribe to any server's member-update topic by sending a Subscribe message with an arbitrary server ID, receiving live UserUpdate events including display names, avatars, and status changes for members they should not have access to.

## Remediation

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