CVE-2026-49139

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.

CVSS

No CVSS.

References

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

Configurations

No configuration.

History

01 Jun 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-01 21:16

Updated : 2026-06-17 10:55

NVD link : CVE-2026-49139

Mitre link : CVE-2026-49139

CVE.ORG link : CVE-2026-49139

JSON object : View

Products Affected

No product.

CWE

CWE-918

Server-Side Request Forgery (SSRF)

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