CVE-2026-23897— Apollo Server is vulnerable to denial of service with `startStandaloneServer`
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I. Basic Information for CVE-2026-23897
Vulnerability Information
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Vulnerability Title
Apollo Server is vulnerable to denial of service with `startStandaloneServer`
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
CWE-1333
Source: NVD (National Vulnerability Database)
Vulnerability Title
@apollo/server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
@apollo/server是Apollo GraphQL开源的一个JS代码包。 @apollo/server 3.13.0之前版本、4.13.0之前版本和5.4.0之前版本存在安全漏洞，该漏洞源于默认配置对特殊字符集编码请求处理不当，可能导致拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| apollographql | apollo-server | >= 2.0.0, <= 3.13.0 | - |
II. Public POCs for CVE-2026-23897
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
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Same weakness: CWE-1333
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V. Comments for CVE-2026-23897
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