parse-community parse-server up to 8.6.51/9.6.0-alpha.40 improper authentication

CVSS Meta Temp Score
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CTI Interest Score
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6.5$0-$5k0.90

Summaryinfo

A vulnerability was found in parse-community parse-server up to 8.6.51/9.6.0-alpha.40. It has been classified as critical. Affected by this vulnerability is an unknown functionality. The manipulation leads to improper authentication. This vulnerability is uniquely identified as CVE-2026-33409. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in parse-community parse-server up to 8.6.51/9.6.0-alpha.40. This issue affects an unknown code block. The manipulation with an unknown input leads to a improper authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.52 and 9.6.0-alpha.41, an authentication bypass vulnerability allows an attacker to log in as any user who has linked a third-party authentication provider, without knowing the user's credentials. The attacker only needs to know the user's provider ID to gain full access to their account, including a valid session token. This affects Parse Server deployments where the server option allowExpiredAuthDataToken is set to true. The default value is false. This issue has been patched in versions 8.6.52 and 9.6.0-alpha.41.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-33409 since 03/19/2026. The exploitation is known to be difficult. The attack may be initiated remotely. Additional levels of successful authentication are required for exploitation. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 8.6.52 or 9.6.0-alpha.41 eliminates this vulnerability. Applying the patch 8d7df5639c4a35768fe8b78b4580b30e8a74721c 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.

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Productinfo

Vendor

Name

Version

License

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: 6.6
VulDB Meta Temp Score: 6.5

VulDB Base Score: 4.1
VulDB Temp Score: 3.9
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.1
NVD Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
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 8.6.52/9.6.0-alpha.41
Patch: 8d7df5639c4a35768fe8b78b4580b30e8a74721c

Timelineinfo

03/19/2026 CVE reserved
03/24/2026 +5 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-pfj7-wv7c-22pr
Status: Confirmed

CVE: CVE-2026-33409 (🔒)
GCVE (CVE): GCVE-0-2026-33409
GCVE (VulDB): GCVE-100-352847

Entryinfo

Created: 03/24/2026 20:52
Updated: 03/29/2026 06:47
Changes: 03/24/2026 20:52 (69), 03/29/2026 06:47 (12)
Complete: 🔍
Cache ID: 216:893:103

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