GHSA-jc39-686j-wp6q
Parse Server's Session Update endpoint allows overwriting server-generated session fields
At a glance
- Published
- Updated
- CVE
- CVE-2026-33527
- Aliases
- BIT-parse-2026-33527
- CVSS_V3
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- CVSS_V4
- 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
Description
### 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
Affected packages
| Package | Versions |
|---|---|
| npm · parse-server | introduced 9.0.0, fixed 9.6.0-alpha.48 |
| npm · parse-server | introduced 0, fixed 8.6.57 |
References
- https://github.com/parse-community/parse-server/security/advisories/GHSA-jc39-686j-wp6q WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-33527 ADVISORY
- https://github.com/parse-community/parse-server/pull/10263 WEB
- https://github.com/parse-community/parse-server/pull/10264 WEB
- https://github.com/parse-community/parse-server/commit/26b628c8fb3cc79ea955374769eebcff6f8a8a73 WEB
- https://github.com/parse-community/parse-server/commit/ea68fc0b22a6056c9675149469ff57817f7cf984 WEB
- https://github.com/parse-community/parse-server PACKAGE
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |