CVE-2026-33527

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

CVSS 5.3 MEDIUMEPSS 0.3%CWE-863

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.3EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

24 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 8.6.57 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.

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

Affected products

parse-community · parse-server

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References

https://github.com/parse-community/parse-server/commit/26b628c8fb3cc79ea955374769eebcff6f8a8a73 https://github.com/parse-community/parse-server/commit/ea68fc0b22a6056c9675149469ff57817f7cf984 https://github.com/parse-community/parse-server/pull/10263 https://github.com/parse-community/parse-server/pull/10264 https://github.com/parse-community/parse-server/security/advisories/GHSA-jc39-686j-wp6q