CVE-2026-23897: Apollo Serve vulnerable to Denial of Service with `startStandaloneServer`
The default configuration of startStandaloneServer from @apollo/server/standalone is vulnerable to Denial of Service (DoS) attacks through specially crafted request bodies with exotic character set encodings.
This issue does not affect users that use @apollo/server as a dependency for integration packages, like @as integrations/express5 or @as-integrations/next, only direct usage of startStandaloneServer.
References
- github.com/advisories/GHSA-mp6q-xf9x-fwf7
- github.com/apollographql/apollo-server
- github.com/apollographql/apollo-server/commit/d25a5bdc377826ad424fcf7f8d1d062055911643
- github.com/apollographql/apollo-server/commit/e9d49d163a86b8a33be56ed27c494b9acd5400a4
- github.com/apollographql/apollo-server/security/advisories/GHSA-mp6q-xf9x-fwf7
- nvd.nist.gov/vuln/detail/CVE-2026-23897
Code Behaviors & Features
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