{"id":"CVE-2026-49139","title":"Nanobot < 0.2.1 SSRF via Microsoft Teams Channel serviceUrl Poisoning","summary":"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 atta…","severity":"high","cvss":7,"cvssVector":"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","cvssSource":"cna","cwe":["CWE-918"],"vendor":"HKUDS","product":"nanobot","affected":["nanobot < 0.2.1"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-06-02T15:27:12.755532Z"},"published":"2026-06-01","updated":"2026-11-08","sourceUpdated":"2026-11-08T14:04:48.173Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-49139","references":[{"url":"https://github.com/HKUDS/nanobot/releases/tag/v0.2.1","label":"nanobot 0.2.1 Release Notes"},{"url":"https://github.com/HKUDS/nanobot/pull/4047"},{"url":"https://github.com/HKUDS/nanobot/commit/232df45126bcf0f8fccd123d73714f202c8e8612"},{"url":"https://www.vulncheck.com/advisories/nanobot-ssrf-via-microsoft-teams-channel-serviceurl-poisoning"}],"tags":["cve.org"],"epss":0.00382,"epssPercentile":0.32464,"ingestedAt":"2026-11-08T14:51:22.386Z","slug":"CVE-2026-49139","body":"## Overview\n\nNanobot 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.\n\n## Affected\n\n- `nanobot < 0.2.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}