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TI-2026-23764 Aliases CVE-2026-30939GHSA-5j86-7r7m-p8h6

Parse Server has Denial of Service (DoS) and Cloud Function Dispatch Bypass via Prototype Chain Resolution

Priority MEDIUM 45CWE-1321Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 8.6.13 and 9.5.1-alpha.2, an unauthenticated attacker can crash the Parse Server process by calling a Cloud Function endpoint with a prototype property name as the function name. The server recurses infinitely, causing a call stack size error that terminates the process. Other prototype property names bypass Cloud Function dispatch validation and return HTTP 200 responses, even though no such Cloud Functions are defined. The same applies to dot-notation traversal. All Parse Server deployments that expose the Cloud Function endpoint are affected. This vulnerability is fixed in 8.6.13 and 9.5.1-alpha.2.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0057 47th percentileScored 2026-11-07
Fix Fixed parse-server (parse-community): 8.6.13parse-server (npm): 8.6.13, 9.5.1-alpha.2

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-serverbefore 8.6.13; >= 9.0.0 < 9.5.1-alpha.28.6.13Patch availableCNA
—parse-server (npm)before 8.6.138.6.13Patch availableGHSA-5j86-7r7m-p8h6
—parse-server (npm)9.0.0-alpha.1 to before 9.5.1-alpha.29.5.1-alpha.2Patch availableGHSA-5j86-7r7m-p8h6
  • parse-server Vendorparse-community Affected before 8.6.13; >= 9.0.0 < 9.5.1-alpha.2 Fixed in 8.6.13 Patch available CNA
  • parse-server (npm) Vendor— Affected before 8.6.13 Fixed in 8.6.13 Patch available GHSA-5j86-7r7m-p8h6
  • parse-server (npm) Vendor— Affected 9.0.0-alpha.1 to before 9.5.1-alpha.2 Fixed in 9.5.1-alpha.2 Patch available GHSA-5j86-7r7m-p8h6

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*before 8.6.13; 9.0.0 to before 9.5.1Vulnerableparse-community
cpe:2.3:a:parseplatform:parse-server:9.5.1:alpha1:*:*:*:node.js:*:*9.5.1 alpha1Vulnerableparse-community
  • cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:* Versions before 8.6.13; 9.0.0 to before 9.5.1 Vulnerable ·parse-community
  • cpe:2.3:a:parseplatform:parse-server:9.5.1:alpha1:*:*:*:node.js:*:* Versions 9.5.1 alpha1 Vulnerable ·parse-community

Remediation

  • Fix · CNA parse-server (parse-community) Fixed in 8.6.13
  • Fix · GHSA-5j86-7r7m-p8h6 parse-server (npm) Fixed in 8.6.13 Advisory →
  • Fix · GHSA-5j86-7r7m-p8h6 parse-server (npm) Fixed in 9.5.1-alpha.2 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-30939
  2. 2026-10-03 Alias added: GHSA-5j86-7r7m-p8h6
  3. 2026-10-25 EPSS moved to the below the 50th percentile

References

Patch 1

Advisory 1

Other 3

  • 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-2023-18316 Parse Server vulnerable to remote code execution via MongoDB BSON parser through prototype pollution CVSS 3.1CRITICAL 9.8
  • TI-2026-23790 Parse Server session token exfiltration via `redirectClassNameForKey` query parameter CVSS 4.0CRITICAL 9.9
See all 101 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences