{"id":"CVE-2026-63116","revision":null,"records":[{"revision":"d40b7ef2a73444ad912ba03b626df0bf","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-63116","aliases":[],"title":"deepstream: PATCH_MULTI action bypasses Valve permission system allowing unauthorized record writes","description":"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.","state":0,"publishedAt":"2026-09-21T16:59:22.958+00:00","modifiedAt":"2026-09-21T17:59:34.586+00:00","affected":[{"ecosystem":"Vendor product","name":"deepstream.io","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"deepstreamIO\",\n                    \"product\": \"deepstream.io\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 10.1.0, < 10.1.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8,"severity":"HIGH"}],"references":["https://github.com/deepstreamIO/deepstream.io/security/advisories/GHSA-89vx-jh4q-vg3w","https://github.com/deepstreamIO/deepstream.io/commit/1c2adde6581c53ef47e204364bc740bc3c2e2e2a","https://github.com/deepstreamIO/deepstream.io/releases/tag/v10.1.1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-63116","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-63116","identifiers":["CVE-2026-63116"]},"retained":false,"historicalAffected":[]},{"revision":"f0d859c230da41949e3b3ab6b64cf017","observedAt":"2026-11-11T15:05:34.209+00:00","statement":{"source":"euvd","id":"EUVD-2026-84001","aliases":["CVE-2026-63116","GHSA-89vx-jh4q-vg3w"],"title":"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…","description":"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.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8,"severity":null}],"references":["https://github.com/deepstreamIO/deepstream.io/security/advisories/GHSA-89vx-jh4q-vg3w","https://github.com/deepstreamIO/deepstream.io/commit/1c2adde6581c53ef47e204364bc740bc3c2e2e2a","https://github.com/deepstreamIO/deepstream.io/releases/tag/v10.1.1"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-84001","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Sep 21, 2026, 4:59:22 PM","dateUpdated":"Sep 21, 2026, 5:59:34 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. 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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.","state":0,"publishedAt":"2026-09-21T17:17:38.51+00:00","modifiedAt":"2026-09-24T21:25:27.05+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8,"severity":"HIGH"}],"references":["https://github.com/deepstreamIO/deepstream.io/commit/1c2adde6581c53ef47e204364bc740bc3c2e2e2a","https://github.com/deepstreamIO/deepstream.io/releases/tag/v10.1.1","https://github.com/deepstreamIO/deepstream.io/security/advisories/GHSA-89vx-jh4q-vg3w"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-63116","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-862"],"productCriteria":[],"sourceDates":{"published":"2026-09-21T17:17:38.510","lastModified":"2026-09-24T21:25:27.050"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-63116","identifiers":["CVE-2026-63116"]},"retained":false,"historicalAffected":[]},{"revision":"38c1412d22884ea2af51d41e90db57d4","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-89vx-jh4q-vg3w","aliases":["CVE-2026-63116"],"title":"deepstream: PATCH_MULTI action bypasses Valve permission system allowing unauthorized record writes","description":"## Summary\n\nThe `RECORD_ACTION.PATCH_MULTI` action is not registered in the Valve permission system's `RULES_MAP` (`src/services/permission/valve/rules-map.ts`). When `ConfigPermission.canPerformAction()` is called for a PATCH_MULTI message, `getRulesForMessage()` returns `null` because the action is missing from the map. This triggers an unconditional allow (`callback(..., null, true)`), completely bypassing all configured Valve permission rules.\n\nAny authenticated user — regardless of their configured permissions — can write arbitrary data to any record using the PATCH_MULTI action.\n\n## Root Cause\n\nIn `src/services/permission/valve/rules-map.ts` lines 38-54, the `RULES_MAP[TOPIC.RECORD].actions` dictionary maps record actions to permission rule types. The actions registered include: SUBSCRIBE, SUBSCRIBEANDHEAD, SUBSCRIBEANDREAD, READ, HEAD, LISTEN, CREATE, UPDATE, PATCH, NOTIFY, DELETE, ERASE. However, `RECORD_ACTION.PATCH_MULTI` is **absent** from this map.\n\nWhen `getRulesForMessage()` at line 86-99 encounters an action not in the map, it returns `null`. In `config-permission.ts` at line 88-93, when `ruleSpecification === null`, the callback is invoked with `true` (allow) unconditionally.\n\n## Attack Chain\n\n1. Attacker authenticates with any valid credentials (even a minimal-privilege user)\n2. Attacker sends a WebSocket message: `{topic: RECORD, action: PATCH_MULTI, name: \"admin/secret-record\", parsedData: [{path: \"role\", data: \"admin\"}]}`\n3. `message-processor.ts:68` invokes permission check\n4. `config-permission.ts:89` → `getRulesForMessage()` returns `null` for PATCH_MULTI\n5. `config-permission.ts:92` → unconditional ALLOW\n6. Record transition applies the operations — arbitrary record is modified\n\n## Impact\n\n- **Complete Valve permission bypass for record writes** — all configured permission rules are irrelevant\n- Any authenticated user can overwrite any record, including admin-only records\n- Mass record overwrites can destroy application state, corrupt sessions, cause service outage\n- Only exploitable when `permission.type` is set to `config` (Valve) — the recommended production configuration per deepstream documentation\n- Default permission type `none` (OpenPermission) allows everything already, so default deployments are unaffected\n\n<details><summary>Proof of Concept</summary>\n\n```javascript\n// Connect as a minimal-privilege user\nconst { DeepstreamClient } = require('@deepstream/client');\nconst client = new DeepstreamClient('localhost:6020');\nawait client.login({ username: 'restricted-user', password: 'password' });\n\n// This should be blocked by Valve permissions but isn't:\n// Send raw PATCH_MULTI message to bypass all permission rules\nconst connection = client.getConnection();\nconnection.sendMessage({\n  topic: 0x52, // TOPIC.RECORD\n  action: 0x50, // RECORD_ACTION.PATCH_MULTI (check actual enum value)\n  name: 'admin/protected-record',\n  parsedData: [\n    { path: 'permissions', data: 'admin' },\n    { path: 'secret', data: 'overwritten' }\n  ]\n});\n```\n</details>\n\n## Suggested Fix\n\nAdd `PATCH_MULTI` to the RULES_MAP in `src/services/permission/valve/rules-map.ts`:\n\n```typescript\n[RECORD_ACTION.PATCH_MULTI]: RULE_TYPES.WRITE,\n```\n\nThis maps PATCH_MULTI operations to the same WRITE permission rule that governs UPDATE and PATCH.\n\n## Affected Versions\n\nAll versions that include PATCH_MULTI support with the Valve (ConfigPermission) permission system. The PATCH_MULTI action was added in commit `82ffa8119d8f4a8242ac5c3507469a22de746b65` but was never registered in RULES_MAP.\n\n## Credit\n\nVulnerability discovered by Zhixi \"Jace\" Sun of ASM/VI at TikTok.","state":0,"publishedAt":"2026-09-22T19:56:34+00:00","modifiedAt":"2026-09-22T20:15:05.103023+00:00","affected":[{"ecosystem":"npm","name":"@deepstream/server","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"10.1.0"},{"kind":"fixed","version":"10.1.1"}]}],"versions":["10.1.0"],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["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","https://github.com/deepstreamIO/deepstream.io","https://github.com/deepstreamIO/deepstream.io/releases/tag/v10.1.1"],"sourceUrl":"https://github.com/advisories/GHSA-89vx-jh4q-vg3w","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-89vx-jh4q-vg3w","identifiers":["GHSA-89vx-jh4q-vg3w","CVE-2026-63116"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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