Vulnerabilities
Vulnerable Software

Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 13.6%
CVSS Severity
CVSS v3 Score 3.7
Products affected by CVE-2026-39321


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