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CVE-2026-39381 parse-community CVE debrief

CVE-2026-39381 is a vulnerability in Parse Server, an open-source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 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 versions 9.8.0-alpha.7 and 8.6.75.

Vendor
parse-community
Product
parse-server
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-07
Original CVE updated
2026-07-24
Advisory published
2026-04-07
Advisory updated
2026-07-24

Who should care

Users of Parse Server, especially those who have configured protected fields for sessions, should be aware of this vulnerability and take steps to upgrade to a patched version. This includes reviewing and adjusting protectedFields server option configurations, monitoring for and restricting access to sensitive session data, and ensuring that all team members and stakeholders are informed about the potential risks and necessary mitigations.

Technical summary

The vulnerability exists in the GET /sessions/me endpoint of Parse Server. When a server operator configures certain fields as protected using the protectedFields server option, these fields are still returned in the response of the GET /sessions/me endpoint for authenticated users. This allows authenticated users to access their own session's protected fields. The vulnerability has a CVSS score of 5.3 and a severity of MEDIUM.

Defensive priority

Medium priority should be given to upgrading Parse Server to a version that fixes this vulnerability, especially for users who have configured protected fields for sessions.

Recommended defensive actions

  • Upgrade to Parse Server version 9.8.0-alpha.7 or later
  • Upgrade to Parse Server version 8.6.75 or later
  • Review and adjust protectedFields server option configurations
  • Monitor for and restrict access to sensitive session data
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record was published on 2026-04-07T20:16:32.790Z and was last modified on 2026-07-24T21:10:00.143Z. The NVD entry is currently Analyzed. Evidence is limited to public CVE and NVD information. Defenders should verify the vulnerability's impact on their specific Parse Server deployments, especially if they have configured protected fields for sessions. They should also review the official advisory and CVE record to validate affected scope, severity, and vendor guidance.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-04-07T20:16:32.790Z and has not been modified since then. The NVD entry is currently Analyzed.