{"id":"CVE-2026-49139","summary":"Nanobot \u003c 0.2.1 SSRF via Microsoft Teams Channel serviceUrl Poisoning","details":"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.","modified":"2026-08-12T03:51:35.112472839Z","published":"2026-06-01T19:50:42.993Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-918"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49139.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49139.json"},{"type":"ADVISORY","url":"https://github.com/HKUDS/nanobot/releases/tag/v0.2.1"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49139"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/nanobot-ssrf-via-microsoft-teams-channel-serviceurl-poisoning"},{"type":"REPORT","url":"https://github.com/HKUDS/nanobot/pull/4047"},{"type":"FIX","url":"https://github.com/HKUDS/nanobot/commit/232df45126bcf0f8fccd123d73714f202c8e8612"},{"type":"PACKAGE","url":"https://github.com/HKUDS/nanobot"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/hkuds/nanobot","events":[{"introduced":"0"},{"fixed":"232df45126bcf0f8fccd123d73714f202c8e8612"},{"fixed":"f309982bb0a2dca76dd038473ee6f1be803bd503"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"0.2.1"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v0.2.0","v0.1.5.post3","v0.1.5.post2","v0.1.5.post1","v0.1.5","v0.1.4.post6","v0.1.4.post4","v0.1.4.post3","v0.1.4.post2","v0.1.4.post1","v0.1.4","v0.1.3.post6","v0.1.3.post5","v0.1.3.post4"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49139.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}