CVE-2026-100679

stoatchat before 0.15.5 MFA Bypass via Cross-Account Ticket

Published Sep 26, 2026 CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

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

Type Values Removed Values Added
First Time appeared Stoatchat
Stoatchat stoatchat
Vendors & Products Stoatchat
Stoatchat stoatchat
Type Values Removed Values Added
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.
Title stoatchat before 0.15.5 MFA Bypass via Cross-Account Ticket
Weaknesses CWE-639
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Sep 28, 2026, 6:03 PM
Reserved
Sep 26, 2026, 2:36 AM
Status
Deferred
Published
Sep 26, 2026, 2:16 PM
Modified
Sep 28, 2026, 6:17 PM