CVE-2026-33527
Session Fixation Vulnerability in Parse Server Allows Permanent Sessions
Publication date: 2026-03-24
Last updated on: 2026-03-25
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| 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 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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
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.