Dashboard / CVE-2026-49139

CVE-2026-49139

HIGH
MEDIUM Priority: 0.03 BB Relevance: 74/100
Published: 2026-06-01 Modified: 2026-11-08 First seen: 2026-11-08 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
AT: Present
VC: None
VI: Low
VA: None

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
HKUDS nanobot 0 < 0.2.1

References & Advisories (4)

Bug Bounty Relevance

74 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

7.0 / 10.0 v4.0
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

EPSS — Exploitation Probability

0.38%
Raw Score 0.003820
Percentile 32.7%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00382
2026-11-12
0.00382
2026-11-10
0.00382
2026-11-09
0.00382
2026-11-08
0.00382

Intelligence Sources

mitre ref →

External Links