PT-2026-45561 · Hkuds · Nanobot

Published 2026-06-01 · Updated 2026-06-01 · CVE-2026-49139

Mitre

CVSS v4.0

7.0

High

Base vector

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

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.

Fix

SSRF

Weakness Enumeration

CWE-918

Related Identifiers

CVE-2026-49139

Affected Products

Nanobot

References · 5

• https://github.com/HKUDS/nanobot/commit/232df45126bcf0f8fccd123d73714f202c8e8612 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-49139 · Security Note
• https://github.com/HKUDS/nanobot/pull/4047 · Note
• https://github.com/HKUDS/nanobot/releases/tag/v0.2.1 · Note
• https://vulncheck.com/advisories/nanobot-ssrf-via-microsoft-teams-channel-serviceurl-poisoning · Note