CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2026-23897
High (7.5) in apollographql apollo server. EPSS 0.7% chance of exploitation in the next 30 days. Fixed in @apollo/server 4.13.0, 5.4.0.
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
- EPSS
- 0.7% chance of exploitation in the next 30 days; higher than 52% of CVEs (scores of 2026-10-31)
- CWE
- CWE-1333
- Published
- Modified
- Record from
- the NVD, synced
Affected
- apollographql:apollo_server
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-mp6q-xf9x-fwf7 | npm | apollo-server | >=2.0.0 <=3.13.0 | no fix published |
| GHSA-mp6q-xf9x-fwf7 | npm | @apollo/server | >=4.2.0 <4.13.0 | 4.13.0 |
| GHSA-mp6q-xf9x-fwf7 | npm | @apollo/server | >=5.0.0 <5.4.0 | 5.4.0 |