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Parse Server CVE-2026-29182

HIGH
Incorrect Authorization (CWE-863)
2026-03-06 security-advisories@github.com GHSA-vc89-5g3r-cmhh
Node.js Parse Server Parseplatform
7.2
CVSS 3.1 · GitHub Advisory
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Obtain readOnlyMasterKey credential
  2. Exploit
    Send mutating request to Cloud Hooks endpoint
  3. Execution
    Create malicious hook for data exfiltration
  4. Impact
    Execute unauthorized data access and modification

Vulnerability Assessment

Weakness
CWE
CWE-863
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization logic validation
MITRE ATT&CK

1 technique across 1 tactic: Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

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Exploitation Conditions

Parse Server versions prior to 8.6.4 or 9.4.1-alpha.3 with readOnlyMasterKey option enabled in configuration. Attacker must possess the readOnlyMasterKey credential.
Impact

CVSS 7.2 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: High. User interaction: None.
Exploit ScenarioDerived

An attacker could exploit this vulnerability to compromise the affected system.
This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Parse Server's readOnlyMasterKey incorrectly permits write operations on Cloud Hooks and Cloud Jobs despite being documented to deny mutations, allowing authenticated attackers with knowledge of the key to create, modify, and delete hooks or trigger jobs for potential data exfiltration. This vulnerability affects all Parse Server deployments using the readOnlyMasterKey option and has been patched in versions 8.6.4 and 9.4.1-alpha.3.

Earlier versions of this analysis (1)
v1 Mar 12, 2026 - 22:06 CVSS 7.2

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.4 and 9.4.1-alpha.3, Parse Server's readOnlyMasterKey option allows access with master-level read privileges but is documented to deny all write operations. [CVSS 7.2 HIGH]

RemediationAI

A vendor patch is available — apply it immediately. Restrict network access to the affected service where possible.

Affected Packages

npm parse-server fix: 8.6.4, 9.4.1-alpha.3

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in npm

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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Technical ContextAI · show details

Classified as CWE-863 (Incorrect Authorization). Affects Parse-Server. Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.4 and 9.4.1-alpha.3, Parse Server's readOnlyMasterKey option allows access with master-level read privileges but is documented to deny all write operations. However, some endpoints incorrectly accept the readOnlyMasterKey for mutating operations. This allows a caller who only holds the readOnlyMasterKey to create, modify, and delete Cloud Hooks and to start Cloud Jobs, wh

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Severity by source

GitHub Advisory PRIMARY 7.2 HIGH
AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

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

Lifecycle Timeline

2
Patch released
Mar 10, 2026 - 19:53 nvd
Patch available
CVE Published
Mar 06, 2026 - 21:16 nvd
HIGH 7.2

DescriptionGitHub Advisory

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.4 and 9.4.1-alpha.3, Parse Server's readOnlyMasterKey option allows access with master-level read privileges but is documented to deny all write operations. However, some endpoints incorrectly accept the readOnlyMasterKey for mutating operations. This allows a caller who only holds the readOnlyMasterKey to create, modify, and delete Cloud Hooks and to start Cloud Jobs, which can be used for data exfiltration. Any Parse Server deployment that uses the readOnlyMasterKey option is affected. Note than an attacker needs to know the readOnlyMasterKey to exploit this vulnerability. This issue has been patched in versions 8.6.4 and 9.4.1-alpha.3.

Executive ViewAI

Why It Matters

Parse Server deployments using the readOnlyMasterKey feature are vulnerable to unauthorized data modification despite the key being documented to prevent write operations. This affects organizations relying on Parse Server for backend infrastructure, potentially exposing sensitive data to tampering and compromise of application integrity.

Business Impact: High
Compensating Controls

Apply vendor patch. If immediate patching is not possible: disable readOnlyMasterKey feature until patches are deployed, implement network access controls to restrict Parse Server API endpoints to trusted systems only, and enable detailed audit logging of all master-key authenticated operations for forensic review.

Threat Intelligence Overview

EPSS Score
0.1%
Top 82% exploitable
Data Quality
4 sources
Confidence: Medium
NVD CVE.org EPSS GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.1%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact
High

Priority Score

36
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +36
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Affected Products (CPE)GitHub Advisory

cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.4.1:alpha1:*:*:*:node.js:*:*
cpe:2.3:a:parseplatform:parse-server:9.4.1:alpha2:*:*:*:node.js:*:*

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References

Advisories & patches
PATCH https://github.com/parse-community/parse-server/releases/tag/8.6.4 PATCH https://github.com/parse-community/parse-server/releases/tag/9.4.1-alpha.3 ADVISORY https://github.com/parse-community/parse-server/security/advisories/GHSA-vc89-5g3r-cmhh

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