CVE-2026-31901
published 2026-03-11CVE-2026-31901: 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…
PriorityP428medium5.3CVSS 3.1
AVNACLPRNUINSUCLINAN
EPSS
0.24%
15.1th percentile
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.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| parse-community | parse-server | < 8.6.34 | 8.6.34 |
| parse-community | parse-server | — | — |
| parse-community | parse-server | >= 0 < 8.6.34 | 8.6.34 |
| parse-community | parse-server | >= 9.0.0-alpha.1 < 9.6.0-alpha.8 | 9.6.0-alpha.8 |
| parseplatform | parse-server | < 8.6.34 | 8.6.34 |
| parseplatform | parse-server | — | — |
| parseplatform | parse-server | >= 9.0.0 < 9.6.0 | 9.6.0 |
CVSS provenance
nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
nvdv4.06.3MEDIUMCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
GHSA
Parse Server vulnerable to user enumeration via email verification endpoint
ghsa·2026-03-11
CVE-2026-31901 [MEDIUM] CWE-204 Parse Server vulnerable to user enumeration via email verification endpoint
Parse Server vulnerable to user enumeration via email verification endpoint
### Impact
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`).
### Patches
The fix introduces a new Parse Server option `emailVerifySuccessOnInvalidEmail` (default: `true`) that returns a generic success response for all verification email requests, regardless of whet
OSV
Parse Server vulnerable to user enumeration via email verification endpoint
osv·2026-03-11
CVE-2026-31901 [MEDIUM] Parse Server vulnerable to user enumeration via email verification endpoint
Parse Server vulnerable to user enumeration via email verification endpoint
### Impact
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`).
### Patches
The fix introduces a new Parse Server option `emailVerifySuccessOnInvalidEmail` (default: `true`) that returns a generic success response for all verification email requests, regardless of whet
No detection rules found.
No public exploits indexed.
2026-03-11
Published