What is the CVSS score of CVE-2026-31872?

CVE-2026-31872 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.0%.

How to fix or mitigate CVE-2026-31872?

Within 24 hours: Inventory all Parse Server instances and versions in production; assess whether protected fields contain sensitive data (credentials, PII, financial info). Within 7 days: Implement network segmentation to restrict Parse Server access to trusted applications only; deploy WAF rules to block dot-notation patterns in query parameters (e.g., filter requests containing '.' in WHERE and sort clauses); disable public API access if not business-critical. Within 30 days: Monitor vendor announcements for patch availability; evaluate migration to alternative backends or upgrade to patched versions immediately upon release.

Parse Server CVE-2026-31872

HIGH

Improper Access Control (CWE-284)

2026-03-11 security-advisories@github.com

GHSA-r2m8-pxm9-9c4g

Authentication Bypass PostgreSQL Node.js Parse Server Parseplatform

7.5

CVSS 3.1 · GitHub Advisory

View

Attack ChainAIDerived

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

Access

Craft query with dot-notation in WHERE clause
Exploit

Access protected field subfields
Execution

Perform binary oracle attack
Impact

Enumerate protected field values

Vulnerability Assessment

Weakness	CWE CWE-284 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V8 - Authorization Access control enforcement MITRE ATT&CK 1 technique across 1 tactic: Defense Evasion The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Exploitation Conditions	Parse Server versions prior to 9.6.0-alpha.6 or 8.6.32 with protectedFields class-level permissions (CLP) configured. Attacker must have network access to Parse Server API endpoint. Affects both MongoDB and PostgreSQL deployments with dot-notation query support enabled.
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 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Parse Server versions prior to 9.6.0-alpha.6 and 8.6.32 allow attackers to bypass class-level permission restrictions on protected fields by using dot-notation in query and sort parameters, enabling enumeration of sensitive field values through binary oracle attacks. This affects both MongoDB and PostgreSQL deployments and requires no authentication or user interaction. No patch is currently available for affected versions.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 22:06 CVSS 7.5

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. versions up to 9.6.0 is affected by improper access control.

RemediationAI

Fixed in version 9.6.0.

Affected Packages

npm parse-server fix: 8.6.32, 9.6.0-alpha.6

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.

Technical ContextAI · show details

This vulnerability (CWE-284: Improper Access Control) exists in the query WHERE clauses and sort component. Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.6 and 8.6.32, the protectedFields class-level permission (CLP) can be bypassed using dot-notation in query WHERE clauses and sort parameters. An attacker can use dot-notation to query or sort by sub-fields of a protected field, enabling a binary oracle attack to enumerate protected field values. This affects both MongoDB and PostgreSQL deployments. This vulnerability is fi

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

GitHub Advisory PRIMARY 7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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

CVSS VectorGitHub Advisory

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

CVE Published

Mar 11, 2026 - 18:16 nvd

HIGH 7.5

DescriptionGitHub Advisory

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.6 and 8.6.32, the protectedFields class-level permission (CLP) can be bypassed using dot-notation in query WHERE clauses and sort parameters. An attacker can use dot-notation to query or sort by sub-fields of a protected field, enabling a binary oracle attack to enumerate protected field values. This affects both MongoDB and PostgreSQL deployments. This vulnerability is fixed in 9.6.0-alpha.6 and 8.6.32.

Executive ViewAI

Why It Matters

Parse Server deployments are vulnerable to a HIGH severity authentication bypass that allows attackers to extract protected field values through query manipulation, potentially exposing sensitive data like passwords, API keys, or personal information. This affects all organizations using Parse Server versions prior to 9.6.0-alpha.6 or 8.6.32 without an available patch, creating immediate risk to data confidentiality.

Business Impact: High

Compensating Controls

Implement Web Application Firewall (WAF) rules to block queries and sort parameters containing dot-notation syntax; restrict Parse Server API access via network segmentation and IP whitelisting; disable or heavily restrict public API endpoints; enforce strict input validation to reject dot-notation in user-supplied query parameters; monitor query logs for suspicious dot-notation patterns; consider disabling protectedFields CLPs temporarily if data exposure risk is critical; apply database-level access controls as secondary defense.

Threat Intelligence Overview

EPSS Score

0.0%

Top 89% exploitable

Data Quality

5 sources

Confidence: Medium

NVD

CVE.org

EPSS

GitHub

VulDB

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 0.0%

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

Yes

Human Impact

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +38

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Affected Products (CPE)GitHub Advisory

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

cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha1:*:*:*:node.js:*:*

cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha2:*:*:*:node.js:*:*

cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha3:*:*:*:node.js:*:*

cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha4:*:*:*:node.js:*:*

cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha5:*:*:*:node.js:*:*

Related Vulnerabilities in Parse Server Multiple Vulnerabilities

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CVE-2026-31875 MEDIUM

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CVE-2026-31868 MEDIUM

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More in Parse Server

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Parse Server is an open source http web server backend. Rated critical severity (CVSS 10.0), this vulnerability is remot

CVE-2026-32248 CRITICAL Act Now POC

9.8 Mar 12

Unauthenticated query injection in Parse Server before 9.6.0-alpha.12/8.6.38. PoC available.

CVE-2026-30965 CRITICAL Act Now POC

9.1 Mar 10

Parse Server has an incorrect authorization vulnerability enabling unauthorized data access across applications.

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7.4 Mar 12

### Impact Parse Server's built-in OAuth2 auth adapter exports a singleton instance that is reused directly across all

CVE-2026-30966 CRITICAL Act Now

10.0 Mar 10

Parse Server has a CVSS 10.0 access control vulnerability enabling complete bypass of all data access restrictions.

CVE-2024-27298 CRITICAL Act Now

10.0 Mar 01

parse-server is a Parse Server for Node.js / Express. Rated critical severity (CVSS 10.0), this vulnerability is remotel

CVE-2026-30863 CRITICAL Act Now

9.8 Mar 07

Authentication bypass in Parse Server allows unauthenticated access to protected API endpoints. Parse Server is a popula

CVE-2026-31840 CRITICAL Act Now

9.8 Mar 11

SQL injection in Parse Server before 9.6.0-alpha.2/8.6.28.

CVE-2026-31871 CRITICAL Act Now

9.8 Mar 11

SQL injection in Parse Server before 9.6.0-alpha.5/8.6.31. Third Parse Server SQLi.

CVE-2026-31856 CRITICAL Act Now

9.8 Mar 11

SQL injection in Parse Server before 9.6.0-alpha.5/8.6.31.

CVE-2023-36475 CRITICAL Act Now

9.8 Jun 28

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Rated critical s

CVE-2022-41878 CRITICAL Act Now

9.8 Nov 10

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Rated critical s

Same weakness CWE-284 – Improper Access Control

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CVE-2015-3306 CRITICAL POC

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CVE-2012-4681 CRITICAL POC

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CVE-2011-3544 CRITICAL POC

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CVE-2012-1723 CRITICAL POC

9.8

CVE-2012-5076 CRITICAL POC

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CVE-2014-3120 HIGH POC

8.1

CVE-2013-2423 LOW POC

3.7

CVE-2016-3427 CRITICAL

9.8

Same technique Authentication Bypass

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CVE-2023-22515 CRITICAL POC

9.8

CVE-2013-2465 CRITICAL POC

9.8

CVE-2022-40684 CRITICAL POC

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CVE-2025-61882 CRITICAL POC

9.8

CVE-2024-0012 CRITICAL POC

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References

Advisories & patches

ADVISORY https://vuldb.com/?id.350483 REF https://github.com/parse-community/parse-server/releases/tag/8.6.32 REF https://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.6 REF https://github.com/parse-community/parse-server/security/advisories/GHSA-r2m8-pxm9-9c4g

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