What is the CVSS score of CVE-2026-30925?

CVE-2026-30925 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:N/I:N/A:H. EPSS exploitation probability: 0.0%.

How to fix or mitigate CVE-2026-30925?

Within 24 hours: Identify all Parse Server instances with LiveQuery enabled and assess their internet exposure. Within 7 days: Apply the vendor patch (versions 9.5.0-alpha.14 or 8.6.11+) to all affected deployments during a maintenance window. Within 30 days: Conduct a post-patch audit to confirm all instances are updated and implement monitoring for LiveQuery subscription patterns that may indicate attack attempts.

Parse Server CVE-2026-30925

HIGH

Inefficient Regular Expression Complexity (ReDoS) (CWE-1333)

2026-03-10 security-advisories@github.com

GHSA-mf3j-86qx-cq5j

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

Obtain public application ID and JavaScript key
Delivery

Craft malicious $regex pattern
Exploit

Subscribe to LiveQuery with crafted pattern
Execution

Trigger catastrophic backtracking
Persist

Block Node.js event loop
Impact

Render Parse Server unresponsive

Vulnerability Assessment

Weakness	CWE CWE-1333 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V2 - Validation and Business Logic Regex complexity limits MITRE ATT&CK 1 technique across 1 tactic: Impact The technique list with ATT&CK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 with LiveQuery enabled. Attacker requires application ID and JavaScript key, both publicly available in client-side applications. No authentication required.
Impact	CVSS 7.5 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: None. 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 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Parse Server's LiveQuery feature is vulnerable to denial of service through malicious regex patterns that trigger catastrophic backtracking, freezing the Node.js event loop and rendering the entire server unresponsive to all clients. Attackers only require the publicly available application ID and JavaScript key to exploit this vulnerability on any Parse Server with LiveQuery enabled. Updates to versions 9.5.0-alpha.14 or 8.6.11 and later address this issue.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:55 CVSS 7.5

Parse-Server versions up to 9.5.0 is affected by inefficient regular expression complexity (redos) (CVSS 7.5).

RemediationAI

A vendor patch is available — apply it immediately. Fixed in version 9.5.0. Restrict network access to the affected service where possible.

Affected Packages

npm parse-server fix: 8.6.11, 9.5.0-alpha.14

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-1333: Inefficient Regular Expression Complexity (ReDoS)) affects Parse-Server. Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.5.0-alpha.14 and 8.6.11, a malicious client can subscribe to a LiveQuery with a crafted $regex pattern that causes catastrophic backtracking, blocking the Node.js event loop. This makes the entire Parse Server unresponsive, affecting all clients. Any Parse Server deployment with LiveQuery enabled is affected. The attacker only needs the application ID and JavaScript key, both of whi

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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:N/I:N/A:H

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

None

Integrity

None

Availability

High

Lifecycle Timeline

Patch released

Mar 11, 2026 - 19:53 nvd

Patch available

CVE Published

Mar 10, 2026 - 17:40 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 9.5.0-alpha.14 and 8.6.11, a malicious client can subscribe to a LiveQuery with a crafted $regex pattern that causes catastrophic backtracking, blocking the Node.js event loop. This makes the entire Parse Server unresponsive, affecting all clients. Any Parse Server deployment with LiveQuery enabled is affected. The attacker only needs the application ID and JavaScript key, both of which are public in client-side apps. This only affects LiveQuery subscription matching, which evaluates regex in JavaScript on the Node.js event loop. Normal REST and GraphQL queries are not affected because their regex is evaluated by the database engine. This vulnerability is fixed in 9.5.0-alpha.14 and 8.6.11.

Executive ViewAI

Why It Matters

Parse Server deployments with LiveQuery enabled are vulnerable to denial-of-service attacks where attackers can crash the entire backend service using only publicly available credentials (Application ID and JavaScript key). This vulnerability could render applications completely unavailable to all users until the service is manually restarted.

Business Impact: High

Compensating Controls

Apply vendor patch. If immediate patching is not possible: (1) Disable LiveQuery functionality until patching is complete, (2) Implement network-level rate limiting on WebSocket connections, (3) Restrict JavaScript key distribution to trusted clients only, (4) Deploy WAF rules to detect and block suspicious $regex patterns in requests, (5) Implement request validation to sanitize regex patterns before processing.

Threat Intelligence Overview

EPSS Score

0.0%

Top 98% 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 0.0%

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

Affected Products (CPE)GitHub Advisory

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

cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha1:*:*:*:node.js:*:*

cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha10:*:*:*:node.js:*:*

cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha11:*:*:*:node.js:*:*

cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha12:*:*:*:node.js:*:*

cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha13:*:*:*:node.js:*:*

cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha2:*:*:*:node.js:*:*

cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha3:*:*:*:node.js:*:*

cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha4:*:*:*:node.js:*:*

cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha5:*:*:*:node.js:*:*

cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha6:*:*:*:node.js:*:*

cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha7:*:*:*:node.js:*:*

cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha8:*:*:*:node.js:*:*

cpe:2.3:a:parseplatform:parse-server:9.5.0:alpha9:*:*:*:node.js:*:*

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References

Advisories & patches

PATCH https://github.com/parse-community/parse-server/security/advisories/GHSA-mf3j-86qx-cq5j REF https://github.com/parse-community/parse-server/releases/tag/8.6.11 REF https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.14

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