---
id: CVE-2026-100675
title: >-
  stoatchat versions before 0.15.5 contain a denial of service vulnerability in
  the acknowledgement worker that processes mass mention messages
summary: >-
  stoatchat versions before 0.15.5 contain a denial of service vulnerability in
  the acknowledgement worker that processes mass mention messages. Authenticated
  users can send five crafted role-mention messages to terminate all
  acknowledgeme…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-248
vendor: stoatchat
product: stoatchat
affected:
  - stoatchat < 0.15.5
published: '2026-09-26'
updated: '2026-09-28'
sourceUpdated: '2026-09-28T18:17:14.860'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100675'
references:
  - url: >-
      https://github.com/stoatchat/stoatchat/security/advisories/GHSA-5gq6-v4cf-3qq8
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/stoatchat-before-0.15.5-denial-of-service-via-mass-mentions
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/stoatchat/stoatchat/security/advisories/GHSA-5gq6-v4cf-3qq8
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-28T18:05:58.547883Z'
ingestedAt: '2026-09-26T13:33:20.911Z'
epss: 0.00371
epssPercentile: 0.30826
---

## Overview

stoatchat versions before 0.15.5 contain a denial of service vulnerability in the acknowledgement worker that processes mass mention messages. Authenticated users can send five crafted role-mention messages to terminate all acknowledgement workers, disabling push notifications and mention badges deployment-wide until the API process restarts.

## Remediation

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