CVE-2026-34574

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

CVSS 5.3 MEDIUMEPSS 0.2%CWE-697

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.3EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

31 Mar 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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

Affected products

parse-community · parse-server

Want to know if your infrastructure is exposed to this?

Talk to TrueHacking →

References

https://github.com/parse-community/parse-server/commit/90802969fc713b7bc9733d7255c7519a6ed75d21 https://github.com/parse-community/parse-server/commit/ebccd7fe2708007e62f705ee1c820a6766178777 https://github.com/parse-community/parse-server/pull/10347 https://github.com/parse-community/parse-server/pull/10348 https://github.com/parse-community/parse-server/security/advisories/GHSA-f6j3-w9v3-cq22