CVE-2026-34574CWE-697

Parse Server: Session field immutability bypass via falsy-value guard

Medium · published March 31, 2026

CVSS v4.0
5.3
EPSS
0%
Percentile
26.2
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 8.6.69 and 9.7.0-alpha.14, an authenticated user can bypass the immutability guard on session fields (expiresAt, createdWith) by sending a null value in a PUT request to the session update endpoint. This allows nullifying the session expiry, making the session valid indefinitely and bypassing configured session length policies. This issue has been patched in versions 8.6.69 and 9.7.0-alpha.14.

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:L/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.00340 · 26.2th percentile
Weakness
CWE-697 · Incorrect Comparison
Published
2026-03-31T15:08Z
EPSS history
Timeline
  • 31 MAR 15:08Z
    Parse Server: Session field immutability bypass via falsy-value guard
    cvelistv5