---
title: "CVE-2024-32971: Apollo Router vulnerable to Critical Regression In Query Plan Cache"
url: https://erroneo.us/security/cve/CVE-2024-32971/
description: "CVE-2024-32971 (apollo-router (crates.io (Rust))): Apollo Router is a configurable, graph router written in Rust to run a federated supergraph that uses…"
type: vulnerability-record
section: "Security Digest"
date_published: 2024-05-02
date_modified: 2024-08-02
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2024-32971"
kev: false
cvss: 9.1
epss: 0.00727
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2024-32971: Apollo Router vulnerable to Critical Regression In Query Plan Cache

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.7% , percentile 54: FIRST’s model estimates a 0.7% chance of exploitation activity in the next 30 days, higher than 54% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes apollo-router (crates.io (Rust)) >= 1.44.0, < 1.45.1, fixed in 1.45.1 . Check your lockfile, including transitive dependencies.

## What it is

Apollo Router is a configurable, graph router written in Rust to run a federated supergraph that uses Apollo Federation 2. The affected versions of Apollo Router contain a bug that in limited circumstances, could lead to unexpected operations being executed which can result in unintended data or effects. This only affects Router instances configured to use distributed query plan caching. The root cause of this defect is a bug in Apollo Router’s cache retrieval logic: When this defect is present and distributed query planning caching is enabled, asking the Router to execute an operation (whether it is a query, a mutation, or a subscription) may result in an unexpected variation of that operation being executed or the generation of unexpected errors. The issue stems from inadvertently executing a modified version of a previously executed operation, whose query plan is stored in the underlying cache (specifically, Redis). Depending on the type of the operation, the result may vary. For a query, results may be fetched that don’t match what was requested (e.g., rather than running fetchUsers(type: ENTERPRISE) the Router may run fetchUsers(type: TRIAL). For a mutation, this may result in incorrect mutations being sent to underlying subgraph servers (e.g., rather than sending deleteUser(id: 10) to a subgraph, the Router may run deleteUser(id: 12). Users who are using distributed query plan caching, are advised to either upgrade to version 1.45.1 or above or downgrade to version 1.43.2 of the Apollo Router. Apollo Router versions 1.44.0 or 1.45.0 are not recommended for use and have been withdrawn. Users unable to upgrade can disable distributed query plan caching to mitigate this issue.

## Affected packages

- crates.io (Rust) `apollo-router` >= 1.44.0, < 1.45.1 → fixed: 1.45.1

## Affected products (CVE record)

- apollographql router: >=1.44.0, <1.45.1

## Severity

- GitHub_M CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.0 `CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.73% probability of exploitation activity in the next 30 days; percentile 54.

## Sources

- [GitHub Advisory GHSA-q9p4-hw9m-fj2v](https://github.com/advisories/GHSA-q9p4-hw9m-fj2v)
- [CVE.org record CVE-2024-32971](https://www.cve.org/CVERecord?id=CVE-2024-32971)
- [NVD entry CVE-2024-32971](https://nvd.nist.gov/vuln/detail/CVE-2024-32971)
- [github.com](https://github.com/apollographql/router/security/advisories/GHSA-q9p4-hw9m-fj2v)
- [github.com](https://github.com/apollographql/router/commit/ff9f666598cd17661880fe7fc6e9c9611316e529)
- [github.com](https://github.com/apollographql/router/releases/tag/v1.45.1)
- [apollographql.com](https://www.apollographql.com/docs/router/configuration/distributed-caching/#distributed-query-plan-caching)

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Source page: https://erroneo.us/security/cve/CVE-2024-32971/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt