GHSA-f6j3-w9v3-cq22
Parse Server has a session field immutability bypass via falsy-value guard
At a glance
- Published
- Updated
- CVE
- CVE-2026-34574
- Aliases
- BIT-parse-2026-34574
- CVSS_V4
- 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
Description
### Impact 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. ### Patches The truthiness-based guard checks were replaced with key-presence checks that reject any value for protected session fields, including null. ### Workarounds There is no known workaround. A `beforeSave` trigger on `_Session` could be used to reject null values for `expiresAt` and `createdWith`.
Affected packages
| Package | Versions |
|---|---|
| npm · parse-server | introduced 9.0.0, fixed 9.7.0-alpha.14 |
| npm · parse-server | introduced 0, fixed 8.6.69 |
References
- https://github.com/parse-community/parse-server/security/advisories/GHSA-f6j3-w9v3-cq22 WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-34574 ADVISORY
- https://github.com/parse-community/parse-server/pull/10347 WEB
- https://github.com/parse-community/parse-server/pull/10348 WEB
- https://github.com/parse-community/parse-server/commit/90802969fc713b7bc9733d7255c7519a6ed75d21 WEB
- https://github.com/parse-community/parse-server/commit/ebccd7fe2708007e62f705ee1c820a6766178777 WEB
- https://github.com/parse-community/parse-server PACKAGE
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |