Auth bypass in Parse-Community Parse-Server
CVE-2026-39381
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.7 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-alpha.7 and 8.6.75.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (22.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 22.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Parse-Community Parse-Server — versions >= 9.0.0, < 9.8.0-alpha.7, >= 7.0.0, < 8.6.75
- Parseplatform Parse-Server — versions 9.8.0
Weakness classification (CWE)
References
- github.com/parse-community/parse-server/security/advisories/GHSA-g4v2-qx3q-4p64 (Patch, Vendor Advisory)
- github.com/parse-community/parse-server/pull/10406 (Patch, Issue Tracking)
- github.com/parse-community/parse-server/pull/10407 (Patch, Issue Tracking)
Frequently asked questions
- What is CVE-2026-39381?
- CVE-2026-39381 is a medium-severity vulnerability in Parse-Community Parse-Server, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-04-07.
- How severe is CVE-2026-39381?
- Medium severity. CVSS v3 base score is 4.3 out of 10.