SEPTEMBER 29, 2026
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Case File

CVE-2026-49139

UNKNOWN · CVSS N/A EPSS 0.38% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2026-06-01 · Last synced 2026-08-04

CyberRota Analysis

This vulnerability has an unknown severity rating. It affects Microsoft. Public exploit code or proof-of-concept references have been detected in its references. It may be remotely exploitable.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-49139
Severity
UNKNOWN
CVSS
N/A
EPSS
0.38%
Microsoft

Original NVD Description

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.