CVE-2026-100679stoatchat before 0.15.5 MFA Bypass via Cross-Account Ticket
Updated under an hour ago ()
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It affects stoatchat. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.32%, higher than 23% of scored CVEs.
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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.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-639
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.32% (percentile 23)
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Sep 28, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
stoatchat stoatchat stoatchat:stoatchat (from the name) | before 0.15.5; 0.15.5 not affected | CNA record |
References
- https://github.com/stoatchat/stoatchat/security/advisories/GHSA-gwg6-q3c3-97cxvendor-advisory
- https://www.vulncheck.com/advisories/stoatchat-before-0.15.5-mfa-bypass-via-cross-account-ticketthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.