CVE-2026-39381

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 and 8.6.75, the GET /sessions/me endpoint returns _Session fields that the server operator explicitly configured as protected via the protectedFields server option. Any authenticated user can retrieve their own session's protected fields with a single request. The equivalent GET /sessions and GET /sessions/:objectId endpoints correctly strip protected fields. This vulnerability is fixed in 9.8.0 and 8.6.75.

How to fix CVE-2026-39381

To remediate CVE-2026-39381, upgrade the affected package to a fixed version below.

• —upgrade to 8.6.75 or later
• —upgrade to 9.8.0-alpha.7 or later

Is CVE-2026-39381 being exploited?

Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• >= 7.0.0, < 8.6.75, >= 9.0.0, < 9.8.0
• >= 9.0.0, < 9.8.0-alpha.7

CVSS scores

References (5)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2026-39381
• PATCHgithub.com/parse-community/parse-server
• WEBgithub.com/parse-community/parse-server/pull/10406
• WEBgithub.com/parse-community/parse-server/pull/10407