CVE-2026-33527 MEDIUM

CVE-2026-33527: Parse Server: Session update endpoint allows overwriting server-generated session fields

Vendor Parse-Community
Product parse-server
Weakness CWE-863 · Incorrect authorization
Published March 24, 2026
Last update March 24, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 24, 2026 CVE published
March 24, 2026 Record updated