{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.2.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "232df45126bcf0f8fccd123d73714f202c8e8612"
            },
            {
              "fixed": "f309982bb0a2dca76dd038473ee6f1be803bd503"
            }
          ],
          "repo": "https://github.com/hkuds/nanobot",
          "type": "GIT"
        }
      ]
    }
  ],
  "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"
  },
  "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.",
  "id": "CVE-2026-49139",
  "modified": "2026-08-12T03:51:35.112472839Z",
  "published": "2026-06-01T19:50:42.993Z",
  "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"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Nanobot \u003c 0.2.1 SSRF via Microsoft Teams Channel serviceUrl Poisoning"
}