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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63116
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-21 17:17:38 UTC
Updated2026-09-24 21:25:27 UTC
Descriptiondeepstream 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.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.005060000 probability, percentile 0.406770000 (date 2026-09-25)

Problem Types: CWE-862 | CWE-862 CWE-862: Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA DeepstreamIO Deepstream.io affected >= 10.1.0, < 10.1.1 Not specified

References

ReferenceSourceLinkTags
github.com/deepstreamIO/deepstream.io/releases/tag/v10.1.1 [email protected] github.com
github.com/deepstreamIO/deepstream.io/security/advisories/GHSA-89vx-jh4q... 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/deepstreamIO/deepstream.io/commit/1c2adde6581c53ef47e204364bc... [email protected] github.com
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