stoatchat before 0.15.5 fails to enforce account-level attempt limits on MFA login challenges, allowing attackers who know a password to guess TOTP codes with only IP-based rate limiting. Attackers can reuse MFA challenge tickets across multiple failed attempts and distribute guesses across IP addresses to bypass rate limiting and gain account access.

Project Subscriptions

Vendors Products
Stoatchat Subscribe
Stoatchat Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 30 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sat, 26 Sep 2026 18:30:00 +0000

Type Values Removed Values Added
First Time appeared Stoatchat
Stoatchat stoatchat
Vendors & Products Stoatchat
Stoatchat stoatchat

Sat, 26 Sep 2026 13:30:00 +0000

Type Values Removed Values Added
Description stoatchat before 0.15.5 fails to enforce account-level attempt limits on MFA login challenges, allowing attackers who know a password to guess TOTP codes with only IP-based rate limiting. Attackers can reuse MFA challenge tickets across multiple failed attempts and distribute guesses across IP addresses to bypass rate limiting and gain account access.
Title stoatchat before 0.15.5 MFA Brute Force via Insufficient Rate Limiting
Weaknesses CWE-307
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N'}

cvssV4_0

{'score': 8.3, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N'}


Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-30T15:00:30.440Z

Reserved: 2026-09-26T02:36:51.809Z

Link: CVE-2026-100678

cve-icon Vulnrichment

Updated: 2026-09-30T15:00:23.363Z

cve-icon NVD

Status : Deferred

Published: 2026-09-26T14:16:51.857

Modified: 2026-09-30T16:17:00.153

Link: CVE-2026-100678

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-26T18:15:08Z

Weaknesses