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CWE

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CVE-2026-49139

Published: Jun 1, 2026

Modified: Jun 2, 2026

PUBLISHED

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.

Vendor	Product	Versions
HKUDS	nanobot	affected `0 - < 0.2.1`

Weaknesses (CWE)

References

https://github.com/HKUDS/nanobot/releases/tag/v0.2.1

release-notes

https://github.com/HKUDS/nanobot/pull/4047

issue-tracking

https://github.com/HKUDS/nanobot/commit/232df45126bcf0f8fccd123d73714f202c8e8612

patch

https://www.vulncheck.com/advisories/nanobot-ssrf-via-microsoft-teams-channel-serviceurl-poisoning

third-party-advisory

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