---
cve: "CVE-2026-101050"
severity: "HIGH"
cvss: 8.3
epss: "0.3%"
vendor: "heymrun"
kev: false
exploited: false
published: "2026-09-27 17:16:56"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-10-05T15:05:16+02:00"
---

# CVE-2026-101050

> 8.3 HIGH · 🧪 PoC

## Beschreibung

Heym before 0.0.53 fails to verify the X-Telegram-Bot-Api-Secret-Token header on Telegram webhook endpoints when credential_id is absent or secret_token is empty. Remote unauthenticated attackers can post forged Telegram updates to trigger workflows with the owner's configured credentials and execute actions on attacker-supplied input.

## CNA-Record (Kanon, cvelistV5)

- CNA: **VulnCheck**
- State: PUBLISHED
- Stand: 2026-09-28 13:14:37
- CNA-CVSS: **8.3** (`CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **poc**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- a8ff9b0ed2a0e87a1b66be56ca0a0ea877e19402 (Commit)
- 341d1012367cd74f85c617e1c98dd49e3fcb5e83 (Commit)

## Referenzen

- <https://github.com/heymrun/heym/security/advisories/GHSA-pm6h-x3h5-j38h>
- <https://github.com/heymrun/heym/commit/341d1012367cd74f85c617e1c98dd49e3fcb5e83>
- <https://www.vulncheck.com/advisories/heym-before-0.0.53-authentication-bypass-via-telegram-webhook>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-101050) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_