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CVE-2026-34574

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

Published: Mar 31, 2026Updated: Apr 2, 2026 Sources: CVE List NVDCWE-697
NVD MITRE
5.4CVSSMEDIUM
EPSS Score
0.2%
Top 89.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.69 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.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-697

Affected Products

parse-serverparse-community
LibraryLibrary
OSS Libraries / npm
parse-serverparseplatform
LibraryLibrary
OSS Libraries / generic-library
parse-communityoss-projectOSS Librariesaka parse, parse server, parse-server
parseplatformoss-projectOSS Librariesaka parse platform

Exploitability

Official Patch Available

References

https://github.com/parse-community/parse-server/security/advisories/GHSA-f6j3-w9v3-cq22
github.com
https://github.com/parse-community/parse-server/pull/10347
github.com
https://github.com/parse-community/parse-server/pull/10348
github.com
and 2 more references View all →

Timeline

Published
Mar 31, 2026
Last Updated
Apr 2, 2026

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