GHSA-g4cf-xj29-wqqr
Parse Server: Denial of Service via unindexed database query for unconfigured auth providers
At a glance
- Published
- Updated
- CVE
- CVE-2026-33538
- Aliases
- BIT-parse-2026-33538
- CVSS_V4
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Description
### Impact An unauthenticated attacker can cause Denial of Service by sending authentication requests with arbitrary, unconfigured provider names. The server executes a database query for each unconfigured provider before rejecting the request, and since no database index exists for unconfigured providers, each request triggers a full collection scan on the user database. This can be parallelized to saturate database resources. ### Patches The fix validates that an authentication provider is configured before executing any database query. Requests with unconfigured providers are now rejected immediately without querying the database. ### Workarounds There is no known workaround other than upgrading.
Affected packages
| Package | Versions |
|---|---|
| npm · parse-server | introduced 9.0.0, fixed 9.6.0-alpha.52 |
| npm · parse-server | introduced 0, fixed 8.6.58 |
References
- https://github.com/parse-community/parse-server/security/advisories/GHSA-g4cf-xj29-wqqr WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-33538 ADVISORY
- https://github.com/parse-community/parse-server/pull/10270 WEB
- https://github.com/parse-community/parse-server/pull/10271 WEB
- https://github.com/parse-community/parse-server/commit/40eb442e02672986730007d0a1edb22c1c4bd357 WEB
- https://github.com/parse-community/parse-server/commit/fbac847499e57f243315c5fc7135be1d58bb8e54 WEB
- https://github.com/parse-community/parse-server PACKAGE
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |