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CVE-2026-23897
JavaScript vulnerability analysis and mitigation

Apollo Server is an open-source, spec-compliant GraphQL server that's compatible with any GraphQL client, including Apollo Client. In versions from 2.0.0 to 3.13.0, 4.2.0 to before 4.13.0, and 5.0.0 to before 5.4.0, 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.


SourceNVD

Related JavaScript vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2026-34156CRITICAL9.9
  • JavaScriptJavaScript
  • @nocobase/plugin-workflow-javascript
NoYesMar 30, 2026
CVE-2026-34363HIGH8.2
  • JavaScriptJavaScript
  • parse-server
NoYesMar 30, 2026
CVE-2026-33949HIGH8.1
  • JavaScriptJavaScript
  • @tinacms/graphql
NoYesMar 30, 2026
CVE-2026-34043MEDIUM5.9
  • JavaScriptJavaScript
  • serialize-javascript
NoYesMar 31, 2026
CVE-2026-34373MEDIUM5.3
  • JavaScriptJavaScript
  • parse-server
NoYesMar 30, 2026

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