PT-2026-30950 · Parse Community · Parse Server

Offset · Published 2026-04-07 · Updated 2026-04-07 · CVE-2026-39321

Mitre

CVSS v4.0

6.3

Medium

AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

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.

Fix

Weakness Enumeration

CWE-208

Related Identifiers

CVE-2026-39321

Affected Products

Parse Server

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-39321 · Security Note
• https://github.com/parse-community/parse-server/pull/10398 · Note
• https://github.com/parse-community/parse-server/pull/10399 · Note
• https://github.com/parse-community/parse-server/security/advisories/GHSA-mmpq-5hcv-hf2v · Note