CVE-2026-49139
Nanobot < 0.2.1 SSRF via Microsoft Teams Channel serviceUrl Poisoning
CVSS Score
0.0
EPSS Score
0.1%
EPSS Percentile
32th
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.
| CWE | CWE-918 |
| Vendor | hkuds |
| Product | nanobot |
| Published | Jun 1, 2026 |
| Last Updated | Jun 2, 2026 |
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Affected Versions
HKUDS / nanobot
0 < 0.2.1
References
github.com: https://github.com/HKUDS/nanobot/releases/tag/v0.2.1 github.com: https://github.com/HKUDS/nanobot/pull/4047 github.com: https://github.com/HKUDS/nanobot/commit/232df45126bcf0f8fccd123d73714f202c8e8612 vulncheck.com: https://www.vulncheck.com/advisories/nanobot-ssrf-via-microsoft-teams-channel-serviceurl-poisoning
Credits
Chia Min Jun Lennon