CVE-2026-39321

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.8.0-alpha.6 and 8.6.74, he login endpoint response time differs measurably depending on whether the submitted username or email exists in the database. When a user is not found, the server responds immediately. When a user exists but the password is wrong, a bcrypt comparison runs first, adding significant latency. This timing difference allows an unauthenticated attacker to enumerate valid usernames. This vulnerability is fixed in 9.8.0-alpha.6 and 8.6.74.

CVSS v3 3.7 LOW

3.7^/10

CVSS v3 : LOW

Vector :

Exploitability : 2.2 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/parse-community/parse-server/pull/10398	Issue Tracking Patch
https://github.com/parse-community/parse-server/pull/10399	Issue Tracking Patch
https://github.com/parse-community/parse-server/security/advisories/GHSA-mmpq-5hcv-hf2v	Mitigation Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:parseplatform:parse-server::::::node.js::*
	cpe:2.3:a:parseplatform:parse-server::::::node.js::*
	cpe:2.3:a:parseplatform:parse-server:9.8.0:alpha1::::node.js::*
	cpe:2.3:a:parseplatform:parse-server:9.8.0:alpha2::::node.js::*
	cpe:2.3:a:parseplatform:parse-server:9.8.0:alpha3::::node.js::*
	cpe:2.3:a:parseplatform:parse-server:9.8.0:alpha4::::node.js::*
	cpe:2.3:a:parseplatform:parse-server:9.8.0:alpha5::::node.js::*

History

No history.

Information

Published : 2026-04-07 18:16

Updated : 2026-06-17 10:41

NVD link : CVE-2026-39321

Mitre link : CVE-2026-39321

CVE.ORG link : CVE-2026-39321

JSON object : View

Products Affected

parseplatform

parse-server

CWE

CWE-208

Observable Timing Discrepancy

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