CVE-2026-31901

MEDIUM

5.3

Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 8.6.34 and 9.6.0-alpha.8, the email verification endpoint (/verificationEmailRequest) returns distinct error responses depending on whether an email address belongs to an existing user, is already verified, or does not exist. An attacker can send requests with different email addresses and observe the error codes to determine which email addresses are registered in the application. This is a user enumeration vulnerability that affects any Parse Server deployment with email verification enabled (verifyUserEmails: true). This vulnerability is fixed in 8.6.34 and 9.6.0-alpha.8.

CVE Details

CVSS v3.1 Score5.3

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published3/11/2026

Last Modified3/13/2026

Sourcenvd

Honeypot Sightings0

Affected Products

parseplatform:parse-server

Weaknesses (CWE)

CWE-204

References

https://github.com/parse-community/parse-server/releases/tag/8.6.34(security-advisories@github.com)

https://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.8(security-advisories@github.com)

https://github.com/parse-community/parse-server/security/advisories/GHSA-w54v-hf9p-8856(security-advisories@github.com)

IOC Correlations

No correlations recorded

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