CVE-2026-33527
Received Received - Intake
Session Fixation Vulnerability in Parse Server Allows Permanent Sessions

Publication date: 2026-03-24

Last updated on: 2026-03-25

Assigner: GitHub, Inc.

Description
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.57 and 9.6.0-alpha.48, an authenticated user can overwrite server-generated session fields such as expiresAt and createdWith when updating their own session via the REST API. This allows bypassing the server's configured session lifetime policy, making a session effectively permanent. This issue has been patched in versions 8.6.57 and 9.6.0-alpha.48.
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Meta Information
Published
2026-03-24
Last Modified
2026-03-25
Generated
2026-06-16
AI Q&A
2026-03-24
EPSS Evaluated
2026-06-15
NVD
CVE-2026-33527
EUVD
EUVD-2026-14974
Affected Vendors & Products
Showing 49 associated CPEs
Vendor Product Version / Range
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server From 9.0.0 (inc) to 9.6.0 (exc)
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server 9.6.0
parseplatform parse-server to 8.6.57 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
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Executive Summary

This vulnerability affects Parse Server versions prior to 8.6.57 and 9.6.0-alpha.48. An authenticated user can overwrite server-generated session fields such as expiresAt and createdWith when updating their own session via the REST API.

By doing so, the user can bypass the server's configured session lifetime policy, effectively making their session permanent.

This issue has been fixed in versions 8.6.57 and 9.6.0-alpha.48.

Impact Analysis

The vulnerability allows an authenticated user to make their session effectively permanent by overwriting session expiration fields.

This can lead to unauthorized prolonged access to the system, bypassing intended session expiration and potentially increasing the risk of misuse or compromise of user accounts.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

To mitigate this vulnerability, you should upgrade Parse Server to version 8.6.57 or later, or to version 9.6.0-alpha.48 or later, where the issue has been patched.

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