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GHSA-jc39-686j-wp6q

Parse Server's Session Update endpoint allows overwriting server-generated session fields

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-33527

Packages

EcosystemPackageAffectedFixed in
npm parse-server >= 9.0.0, < 9.6.0-alpha.48 9.6.0-alpha.48
npm parse-server < 8.6.57 8.6.57

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact 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. ### Patches The fix blocks authenticated users from setting `expiresAt` and `createdWith` fields when updating a session. Master key and maintenance key operations are not affected. ### Workarounds There is no known workaround other than upgrading. ### Resources - GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-jc39-686j-wp6q - Fix Parse Server 9: https://github.com/parse-community/parse-server/pull/10263 - Fix Parse Server 8: https://github.com/parse-community/parse-server/pull/10264

References

External links from the advisory. They lead to third-party sites.