---
cve: "CVE-2026-49139"
severity: "HIGH"
cvss: 7.0
epss: "0.4%"
vendor: "HKUDS"
kev: false
exploited: false
published: "2026-06-01 21:16:46"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-29T12:06:26+02:00"
---

# CVE-2026-49139

> 7.0 HIGH · 🧪 PoC

## Beschreibung

Nanobot prior to version 0.2.1 contains a server-side request forgery vulnerability in the Microsoft Teams channel handler that allows remote attackers to exfiltrate Bot Framework bearer tokens by supplying a forged activity with an attacker-controlled serviceUrl value. Attackers can poison the stored conversation reference by sending a crafted inbound activity to the Teams webhook, causing subsequent bot replies to transmit token-bearing Authorization header requests to an attacker-controlled host.

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 232df45126bcf0f8fccd123d73714f202c8e8612 (Commit)
- f309982bb0a2dca76dd038473ee6f1be803bd503 (Commit)

## Referenzen

- <https://github.com/HKUDS/nanobot/releases/tag/v0.2.1>
- <https://github.com/HKUDS/nanobot/pull/4047>
- <https://github.com/HKUDS/nanobot/commit/232df45126bcf0f8fccd123d73714f202c8e8612>
- <https://www.vulncheck.com/advisories/nanobot-ssrf-via-microsoft-teams-channel-serviceurl-poisoning>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-49139) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_