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Medium severity · published Mar 31, 2026
CVE-2026-34574
Parse Server: Session field immutability bypass via falsy-value guard
5.4
CVSS
0.2%
EPSS
No
On KEV
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
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 11% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PA
parse-server · parse-community
< 8.6.69; >= 9.0.0, < 9.7.0-alpha.14 · source: vendor, NVD
Affected product
PA
parse-server
parse-community
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-34574
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-34574
Patch
https://github.com/parse-community/parse-server/commit/90802969fc713b7bc9733d7255c7519a6ed75d21
Patch
https://github.com/parse-community/parse-server/commit/ebccd7fe2708007e62f705ee1c820a6766178777
Issue Tracking
https://github.com/parse-community/parse-server/pull/10347
Issue Tracking
https://github.com/parse-community/parse-server/pull/10348
Patch
https://github.com/parse-community/parse-server/security/advisories/GHSA-f6j3-w9v3-cq22
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