Nezha Monitoring: Cross-tenant terminal/file-manager session hijack via WebSocket stream UUID without ownership check

{
  "id": "932e74731577293eb613d141e28cef54db6fb2566fc5f67942c449c1c14fbc2c",
  "url": "https://osv.dev/vulnerability/CVE-2026-62283",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Nezha Monitoring: Cross-tenant terminal/file-manager session hijack via WebSocket stream UUID without ownership check",
    "summary": "Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. Nezha versions 1.14.13 through 1.14.14 and 2.0.0 through 2.0.9 do not bind stream identifiers created by CreateStream in service/rpc/io_stream.go to their creating user, and `GET /ws/terminal/:id` and `GET /ws/file/:id` only check whether the supplied UUID exists. An authenticated RoleMember who obtains a live stream UUID from logs, browser history, referer data, or telemetry can attach to another user's terminal or file-manager session, read and write target-server files, and execute shell commands. This issue is fixed in version 2.0.10.",
    "evidence": "osv:CVE-2026-62283",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-62283",
      "aliases": [
        "CVE-2026-62283",
        "GHSA-q6xx-5vr8-p898",
        "GO-2026-5821"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/nezhahq/nezha",
              "type": "GIT",
              "events": [
                {
                  "introduced": "439192b4c852e7227d67be3b19b1401973cf0462"
                },
                {
                  "last_affected": "4c4758207d70f92a95bd414ce3175914754dfa4b"
                },
                {
                  "introduced": "e61772e85878d2fc85be3e5b2042946aaa0c454f"
                },
                {
                  "fixed": "43624792a3ddcf11e8cc5fcd4538fa28cae36fc8"
                },
                {
                  "fixed": "6661d6a7fc1c269f55c7f4e775082ad23fbe0f54"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "1.14.13"
                      },
                      {
                        "last_affected": "1.14.14"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "introduced": "2.0.0"
                      },
                      {
                        "fixed": "2.0.10"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "6661d6a7fc1c269f55c7f4e775082ad23fbe0f54"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "43624792a3ddcf11e8cc5fcd4538fa28cae36fc8"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v2.0.10"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.14.14",
            "v1.14.13"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-62283.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.749126644Z",
      "provider": "osv",
      "references": [
        "https://github.com/nezhahq/nezha/releases/tag/v2.0.10",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/62xxx/CVE-2026-62283.json",
        "https://github.com/nezhahq/nezha/security/advisories/GHSA-q6xx-5vr8-p898",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-62283",
        "https://github.com/nezhahq/nezha/commit/6661d6a7fc1c269f55c7f4e775082ad23fbe0f54"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-639",
          "CWE-862"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/62xxx/CVE-2026-62283.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-62283",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490103,
  "published_at": "2026-08-21T20:21:28.712+00:00"
}