CVE-2026-100679 Details
Description
stoatchat before 0.15.5 fails to validate that MFA tickets belong to the authenticated user, allowing attackers to bypass MFA by using their own valid ticket with another user's session token. Attackers can obtain a ticket from their own account and use it with a victim's session token to disable TOTP, view recovery codes, or perform other sensitive operations without providing the victim's credentials.
A vulnerability in Stoatchat versions prior to 0.15.5 allows for multi-factor authentication (MFA) bypass by exploiting a flaw in ticket validation. The application fails to ensure that MFA tickets are tied to the authenticated user, enabling attackers to use their own valid tickets with another user's session tokens. This exploitation can lead to the unauthorized disabling of time-based one-time password (TOTP) authentication, access to recovery codes, or other sensitive actions without the victim's credentials.
Users should update Stoatchat to version 0.15.5 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 26, 2026CISA-ADP
Assessed Sep 28, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/stoatchat/stoatchat/security/advisories/GHSA-gwg6-q3c3-97cx | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/stoatchat/stoatchat/security/advisories/GHSA-gwg6-q3c3-97cx | [email protected] | AdvisoryExploitRemedyVendor |
| https://www.vulncheck.com/advisories/stoatchat-before-0.15.5-mfa-bypass-via-cross-account-ticket | [email protected] | Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-639 | Authorization Bypass Through User-Controlled Key | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| stoatchat | <= 0.15.4 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 28, 2026 | CVE Modified | CISA-ADP |
| Sep 26, 2026 | New CVE Received | [email protected] |