Dashboard / CVE-2026-39321

CVE-2026-39321

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 63/100
Published: 2026-04-07 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: High
PR: None
UI: None
S: X
AT: Present
VC: Low
VI: None
VA: None

Description

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.

Weakness Classification (1)

Affected Software (6)

VendorProductVersion
parseplatform parse-server < 8.6.74
parseplatform parse-server 9.8.0
parseplatform parse-server 9.8.0
parseplatform parse-server 9.8.0
parseplatform parse-server 9.8.0
parseplatform parse-server 9.8.0

References & Advisories (3)

Bug Bounty Relevance

63 / 100
✓ Network accessible
✓ No authentication
✓ No user interaction

CVSS Score

6.3 / 10.0 v4.0
CVSS:4.0/AV:N/AC:H/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

EPSS — Exploitation Probability

0.23%
Raw Score 0.002300
Percentile 13.8%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00230
2026-10-28
0.00230

Intelligence Sources

nvd ref →

External Links