CVE-2026-23897 (GCVE-0-2026-23897)

Vulnerability from cvelistv5 – Published: 2026-02-04 19:18 – Updated: 2026-02-04 19:55
VLAI
Title
Apollo Server is vulnerable to denial of service with `startStandaloneServer`
Summary
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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-04 19:55 UTC
CWE
  • CWE-1333 - Inefficient Regular Expression Complexity
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7836 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
apollographql apollo-server Affected: >= 2.0.0, <= 3.13.0
Affected: >= 4.2.0, < 4.13.0
Affected: >= 5.0.0, < 5.4.0
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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