CVE-2026-63116

HighCVSS 8.8

Published: 21/09/2026(UTC)Updated: 24/09/2026(UTC)Translated: 21/09/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.51%

41th percentile - higher than 41% of all known CVEs

Summary

In deepstream 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.

Risk Assessment

Any authenticated user can modify arbitrary protected records, corrupt application state, or cause service disruption.

Recommendation

Update deepstream to version 10.1.1 or later. Until patched, consider restricting the ability of users to send PATCH_MULTI operations.

Other vulnerabilities in deepstream

CVE-2026-49252Critical
Deepstream is a server that allows clients and backend services to sync data, send messages, and make RPCs at scale. Versions prior to 10.0.5 are vulnerable to Prototype Pollution, which can lead to privilege escalation by any authenticated user with write permission.

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS