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.
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History
Wed, 04 Feb 2026 20:15:00 +0000
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Wed, 04 Feb 2026 19:30:00 +0000
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| Description | 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. | |
| Title | Apollo Server is vulnerable to denial of service with `startStandaloneServer` | |
| Weaknesses | CWE-1333 | |
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cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-02-04T19:55:22.294Z
Reserved: 2026-01-16T21:02:02.903Z
Link: CVE-2026-23897
Updated: 2026-02-04T19:55:15.426Z
Status : Received
Published: 2026-02-04T20:16:05.130
Modified: 2026-02-04T20:16:05.130
Link: CVE-2026-23897
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OpenCVE Enrichment
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