parse-community parse-server up to 8.6.50/9.6.0-alpha.39 Configuration Options response discrepancy

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k1.49

Summaryinfo

A vulnerability was found in parse-community parse-server up to 8.6.50/9.6.0-alpha.39 and classified as problematic. Affected is an unknown function of the component Configuration Options Handler. Executing a manipulation can lead to response discrepancy. This vulnerability is handled as CVE-2026-33323. The attack can be executed remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in parse-community parse-server up to 8.6.50/9.6.0-alpha.39. This vulnerability affects an unknown code of the component Configuration Options Handler. The manipulation with an unknown input leads to a response discrepancy vulnerability. The CWE definition for the vulnerability is CWE-204. The product provides different responses to incoming requests in a way that reveals internal state information to an unauthorized actor outside of the intended control sphere. As an impact it is known to affect confidentiality. CVE summarizes:

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.51 and 9.6.0-alpha.40, the Pages route and legacy PublicAPI route for resending email verification links return distinguishable responses depending on whether the provided username exists and has an unverified email. This allows an unauthenticated attacker to enumerate valid usernames by observing different redirect targets. The existing emailVerifySuccessOnInvalidEmail configuration option, which is enabled by default and protects the API route against this, did not apply to these routes. This issue has been patched in versions 8.6.51 and 9.6.0-alpha.40.

The advisory is available at github.com. This vulnerability was named CVE-2026-33323 since 03/18/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

Upgrading to version 8.6.51 or 9.6.0-alpha.40 eliminates this vulnerability. Applying the patch 967aa57732202009b2389ce9ecb3130d53d657e5 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-14189). Once again VulDB remains the best source for vulnerability data.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Response discrepancy
CWE: CWE-204 / CWE-203 / CWE-200
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: parse-server 8.6.51/9.6.0-alpha.40
Patch: 967aa57732202009b2389ce9ecb3130d53d657e5

Timelineinfo

03/18/2026 CVE reserved
03/24/2026 +6 days Advisory disclosed
03/24/2026 +0 days VulDB entry created
03/29/2026 +5 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-h29g-q5c2-9h4f
Status: Confirmed

CVE: CVE-2026-33323 (🔒)
GCVE (CVE): GCVE-0-2026-33323
GCVE (VulDB): GCVE-100-352846
EUVD: 🔒

Entryinfo

Created: 03/24/2026 20:52
Updated: 03/29/2026 06:47
Changes: 03/24/2026 20:52 (70), 03/24/2026 21:59 (1), 03/29/2026 06:47 (11)
Complete: 🔍
Cache ID: 216:1DF:103

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