deepstream: PATCH_MULTI action bypasses Valve permission system allowing unauthorized record writes

{
  "id": "83e1eb56ee516c9bf1073b691799884d1954221b5a7fad0eae77929f004bed6b",
  "url": "https://osv.dev/vulnerability/CVE-2026-63116",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "deepstream: PATCH_MULTI action bypasses Valve permission system allowing unauthorized record writes",
    "summary": "deepstream is a server that allows clients and backend services to sync data, send messages and make rpcs at scale. From 10.1.0 until 10.1.1, src/services/permission/valve/rules-map.ts omits RECORD_ACTION.PATCH_MULTI from RULES_MAP. When an authenticated user sends a PATCH_MULTI record operation while permission.type is config, getRulesForMessage returns a null rule specification and ConfigPermission.canPerformAction treats the missing specification as an unconditional allow instead of applying RULE_TYPES.WRITE. Any authenticated user can therefore modify arbitrary protected records, corrupt application state, or cause service disruption; deployments using the default permission type none already allow all operations and are not additionally affected. This issue is fixed in version 10.1.1.",
    "evidence": "osv:CVE-2026-63116",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-63116",
      "aliases": [
        "CVE-2026-63116",
        "GHSA-89vx-jh4q-vg3w"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/deepstreamio/deepstream.io",
              "type": "GIT",
              "events": [
                {
                  "introduced": "3abde8de3df91e1b6d18f719d9e38e94bfa314f6"
                },
                {
                  "fixed": "805461c7495c90ad669c103906cc3579db662905"
                },
                {
                  "fixed": "1c2adde6581c53ef47e204364bc740bc3c2e2e2a"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "10.1.0"
                      },
                      {
                        "fixed": "10.1.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "1c2adde6581c53ef47e204364bc740bc3c2e2e2a"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "805461c7495c90ad669c103906cc3579db662905"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v10.1.1"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v10.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63116.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.190832197Z",
      "provider": "osv",
      "references": [
        "https://github.com/deepstreamIO/deepstream.io/releases/tag/v10.1.1",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63116.json",
        "https://github.com/deepstreamIO/deepstream.io/security/advisories/GHSA-89vx-jh4q-vg3w",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-63116",
        "https://github.com/deepstreamIO/deepstream.io/commit/1c2adde6581c53ef47e204364bc740bc3c2e2e2a"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-862"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63116.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-63116",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 489637,
  "published_at": "2026-09-21T16:59:22.958+00:00"
}