CVE-2026-33527CWE-863

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

Medium · published March 24, 2026

CVSS v4.0
5.3
EPSS
0%
Percentile
27.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.3 · MEDIUM
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
EPSS
0.00351 · 27.5th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-03-24T18:22Z
EPSS history
Timeline
  • 24 MAR 18:22Z
    Parse Server: Session update endpoint allows overwriting server-generated session fields
    cvelistv5