{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0"
                  },
                  {
                    "last_affected": "4.11.0"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              },
              {
                "range": [
                  {
                    "fixed": "43c481d74a6388657b84baa7d292c613c75c24f9"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "43c481d74a6388657b84baa7d292c613c75c24f9"
            }
          ],
          "repo": "https://github.com/langbot-app/langbot",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-345"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112265.json"
  },
  "details": "LangBot through 4.11.0 contains a missing authenticity verification vulnerability that allows unauthenticated attackers to inject forged Lark/Feishu events by skipping signature checks. Attackers knowing a bot UUID can POST fabricated im.message.receive_v1 or card.action.trigger events to drive the LLM pipeline, tools, and approvals as other users.",
  "id": "CVE-2026-112265",
  "modified": "2026-10-24T02:30:57.595430687Z",
  "published": "2026-10-19T13:55:15.112Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://pypi.org"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112265.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-112265"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/langbot-through-4.11.0-missing-lark-feishu-webhook-authenticity-verification"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/langbot-app/LangBot/issues/2627"
    },
    {
      "type": "FIX",
      "url": "https://github.com/langbot-app/LangBot/commit/43c481d74a6388657b84baa7d292c613c75c24f9"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/langbot-app/LangBot"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/langbot-app/LangBot/blob/v4.11.0/src/langbot/pkg/api/http/controller/groups/webhooks.py"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/langbot-app/LangBot/blob/v4.11.0/src/langbot/pkg/platform/adapters/lark/adapter.py"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/langbot-app/LangBot/blob/v4.11.0/src/langbot/pkg/platform/sources/lark.py"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "LangBot through 4.11.0 Missing Lark/Feishu Webhook Authenticity Verification"
}