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CVE-2026-35577

Apollo MCP Server is a Model Context Protocol server that exposes GraphQL operations as MCP tools. Prior to version 1.7.0, the Apollo MCP Server did not validate the Host header on incoming HTTP requests when using StreamableHTTP transport. In configurations where an HTTP-based MCP server is run on localhost without additional authentication or network-level controls, this could potentially allow a malicious website—visited by a user running the server locally—to use DNS rebinding techniques to
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:9a1c7b54f1bcc1c20592a12a7dfa848d60d66b147c6eaadea1c36a880a55dcbe
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"apollo-mcp-server","vendor":"apollographql","versions":[{"status":"affected","version":"< 1.7.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:6865cd32363fdf0088c155cd7727e0a2923471372d13beacdb3acee32ad9f9ac · sha256:3b70c80500560de9… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.8,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6865cd32363fdf0088c155cd7727e0a2923471372d13beacdb3acee32ad9f9ac · sha256:3b70c80500560de9… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-346","description":"CWE-346: Origin Validation Error","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6865cd32363fdf0088c155cd7727e0a2923471372d13beacdb3acee32ad9f9ac · sha256:3b70c80500560de9… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/apollographql/apollo-mcp-server/pull/602","tags":["x_refsource_MISC"],"url":"https://github.com/apollographql/apollo-mcp-server/pull/602"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6865cd32363fdf0088c155cd7727e0a2923471372d13beacdb3acee32ad9f9ac · sha256:3b70c80500560de9… · /containers/cna/references/1
{"name":"https://github.com/apollographql/apollo-mcp-server/pull/635","tags":["x_refsource_MISC"],"url":"https://github.com/apollographql/apollo-mcp-server/pull/635"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6865cd32363fdf0088c155cd7727e0a2923471372d13beacdb3acee32ad9f9ac · sha256:3b70c80500560de9… · /containers/cna/references/2
{"name":"https://github.com/apollographql/apollo-mcp-server/security/advisories/GHSA-wqrj-vp8w-f8vh","tags":["x_refsource_CONFIRM"],"url":"https://github.com/apollographql/apollo-mcp-server/security/advisories/GHSA-wqrj-vp8w-f8vh"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6865cd32363fdf0088c155cd7727e0a2923471372d13beacdb3acee32ad9f9ac · sha256:3b70c80500560de9… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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