CVE-2026-34573High· 7.5▾ TwilightParse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.68 and 9.7.0-alpha.12, the GraphQL query complexity validator can be exploited to cause a denial-of-service by …
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 24.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.5%
0.5% → 0.6%
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.68 and 9.7.0-alpha.12, the GraphQL query complexity validator can be exploited to cause a denial-of-service by sending a crafted query with binary fan-out fragment spreads. A single unauthenticated request can block the Node.js event loop for seconds, denying service to all concurrent users. This only affects deployments that have enabled the requestComplexity.graphQLDepth or requestComplexity.graphQLFields configuration options. This issue has been patched in versions 8.6.68 and 9.7.0-alpha.12.
parse-server < 8.6.68parse-server >= 9.0.0, < 9.7.0parse-server = 9.7.0Upgrade past the affected range:
parse-server 9.7.0Connected by shared product, vendor, weakness, or advisory.
GHSA-cgxm-vr2f-6fj8Highparse-server: Denial of service via exponential-time processing of deeply nested query operators
CVE-2026-87806High· 7.4Parse Server versions <= 8.6.87 and >= 9.0.0 < 9.10.1-alpha.7 contain an authentication bypass in the built-in LDAP authentication adapter
CVE-2026-34373High· 8.8Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js
CVE-2026-34363Medium· 5.3Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js
CVE-2026-34224Medium· 4.4Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js
CVE-2026-34595Medium· 4.3Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js