CVE-2026-23897
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
apollo-servernpm | >= 2.0.0, <= 3.13.0 | — |
@apollo/servernpm | >= 4.2.0, < 4.13.0 | 4.13.0 |
@apollo/servernpm | >= 5.0.0, < 5.4.0 | 5.4.0 |
Affected products
4- cpe:2.3:a:apollographql:apollo_server:*:*:*:*:*:*:*:*Range: >=2.0.0,<=3.13.0
- ghsa-coords2 versions
>= 4.2.0, < 4.13.0+ 1 more
- (no CPE)range: >= 4.2.0, < 4.13.0
- (no CPE)range: >= 2.0.0, <= 3.13.0
- Range: >= 2.0.0, <= 3.13.0
Patches
Vulnerability mechanics
References
5- github.com/apollographql/apollo-server/commit/d25a5bdc377826ad424fcf7f8d1d062055911643nvdPatchWEB
- github.com/apollographql/apollo-server/commit/e9d49d163a86b8a33be56ed27c494b9acd5400a4nvdPatchWEB
- github.com/advisories/GHSA-mp6q-xf9x-fwf7ghsaADVISORY
- github.com/apollographql/apollo-server/security/advisories/GHSA-mp6q-xf9x-fwf7nvdMitigationVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-23897ghsaADVISORY
News mentions
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