---
id: CVE-2026-63116
title: >-
  deepstream is a server that allows clients and backend services to sync data,
  send messages and make rpcs at scale
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…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-862
vendor: deepstreamIO
product: deepstream.io
affected:
  - 'deepstream.io >= 10.1.0, < 10.1.1'
patched:
  - '@deepstream/server 10.1.1'
published: '2026-09-21'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T21:25:27.050'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-63116'
references:
  - url: >-
      https://github.com/deepstreamIO/deepstream.io/commit/1c2adde6581c53ef47e204364bc740bc3c2e2e2a
    label: security-advisories@github.com
  - url: 'https://github.com/deepstreamIO/deepstream.io/releases/tag/v10.1.1'
    label: security-advisories@github.com
  - url: >-
      https://github.com/deepstreamIO/deepstream.io/security/advisories/GHSA-89vx-jh4q-vg3w
    label: security-advisories@github.com
  - url: >-
      https://github.com/deepstreamIO/deepstream.io/security/advisories/GHSA-89vx-jh4q-vg3w
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-63116'
  - url: 'https://github.com/advisories/GHSA-89vx-jh4q-vg3w'
tags:
  - nvd
  - cve.org
  - exploit-available
  - ghsa
  - npm
epss: 0.00506
epssPercentile: 0.40594
aliases:
  - GHSA-89vx-jh4q-vg3w
ecosystem: npm
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-21T17:59:12.110552Z'
ingestedAt: '2026-09-21T17:49:53.174Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-63116)

Affected packages:

- `@deepstream/server = 10.1.0`

Patched in:

- `@deepstream/server 10.1.1`

Source: https://github.com/advisories/GHSA-89vx-jh4q-vg3w