---
cve: "CVE-2026-100677"
severity: "MEDIUM"
cvss: 6.9
epss: "0.3%"
vendor: "stoatchat"
kev: false
exploited: false
published: "2026-09-26 14:16:51"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-28T13:34:28+02:00"
---

# CVE-2026-100677

> 6.9 MEDIUM · 🧪 PoC

## Beschreibung

stoatchat before 0.15.5 contains an account enumeration vulnerability in the login endpoint that exposes source file locations in error responses. Unauthenticated attackers can distinguish between registered and unregistered email addresses by comparing error location fields returned from POST /api/auth/session/login requests.

## CNA-Record (Kanon, cvelistV5)

- CNA: **VulnCheck**
- State: PUBLISHED
- Stand: 2026-09-26 13:23:39
- CNA-CVSS: **6.9** (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N`)

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- dc31dd7e62c1f8806b663549700a4121537b9530 (Commit)

## Referenzen

- <https://github.com/stoatchat/stoatchat/security/advisories/GHSA-h44h-xx2j-hp56>
- <https://www.vulncheck.com/advisories/stoatchat-before-0.15.5-account-enumeration-via-error-location>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-100677) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_