Read the docs

Information disclosure in Parse Server LiveQuery with $or queries

Priority LOW 33CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-200.

Summary

Parse Server before 8.6.103 and from 9.0.0 before 9.10.5-alpha.4 contains an information disclosure flaw in LiveQuery. The subscription hash omits constraints next to a $or operator, so distinct subscriptions are grouped together (CWE-200). An authenticated client that subscribes with $or queries can receive other users' events, including session tokens that can be used for impersonation.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Parse Server before 8.6.103 and 9.0.0 before 9.10.5-alpha.4 contains an information disclosure vulnerability in LiveQuery. Its subscription hash omits constraints next to a $or operator, including the _Session owner filter and beforeSubscribe constraints, so distinct subscriptions are grouped together. Authenticated clients subscribing with $or queries can receive other users' events, including session tokens usable for impersonation.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00289 21st percentileScored 2026-11-07
Fix Fixed parse-server (parse-community): 9.10.5-alpha.4, 8.6.103

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
parse-communityparse-server9.0.0 to before 9.10.5-alpha.49.10.5-alpha.4Patch availableCNA
parse-communityparse-serverbefore 8.6.1038.6.103Patch availableCNA
  • parse-server Vendorparse-community Affected 9.0.0 to before 9.10.5-alpha.4 Fixed in 9.10.5-alpha.4 Patch available CNA
  • parse-server Vendorparse-community Affected before 8.6.103 Fixed in 8.6.103 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:*:*:*——parse-community
  • cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:*:*:* Versions — — ·parse-community

Remediation

Upgrade parse-server to 8.6.103 for the 8.x line and to 9.10.5-alpha.4 for the 9.x line.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA parse-server (parse-community) Fixed in 9.10.5-alpha.4
  • Fix · CNA parse-server (parse-community) Fixed in 8.6.103

Timeline

  1. 2026-10-25 Threatist record created from CVE-2026-116161
  2. 2026-10-26 Priority changed: MEDIUM → LOW
  3. 2026-10-27 Alias added: GHSA-rv6r-pc2r-pwj8
  4. 2026-10-29 CISA SSVC decision points changed

References

  • TI-2022-08574 Command Injection in Parse server CVSS 3.1CRITICAL 10.0
  • TI-2024-18136 Parse Server literalizeRegexPart SQL Injection CVSS 3.1CRITICAL 10.0
  • TI-2022-18768 Parse Server vulnerable to Remote Code Execution via prototype pollution in MongoDB BSON parser CVSS 3.1CRITICAL 9.8
  • TI-2024-31550 Parse Server's custom object ID allows to acquire role privileges CVSS 3.1HIGH 8.1
  • TI-2025-35510 parse is a package designed to parse JavaScript SDK. CVSS 3.1MEDIUM 6.5
  • TI-2024-26265 ZDI-CAN-23894: Parse Server literalizeRegexPart SQL Injection Authentication Bypass Vulnerability CVSS 3.1CRITICAL 9.8
See all 158 →

Sources