# CVE-2026-32621: Apollo Federation has prototype pollution via incomplete key sanitization

> CVE-2026-32621: Apollo Federation has prototype pollution via incomplete key sanitization. CVSS 9.9 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-32621
Last updated: 2026-06-17T10:36:06Z

- Published: 2026-03-13 20:29 UTC · Updated: 2026-06-17 10:36 UTC · Assigner: GitHub\_M
- CVSS: 9.9 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
- EPSS: 0.53%, 45th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-1321

## Description

Apollo Federation is an architecture for declaratively composing APIs into a unified graph. Prior to 2.9.6, 2.10.5, 2.11.6, 2.12.3, and 2.13.2, a vulnerability exists in query plan execution within the gateway that may allow pollution of Object.prototype in certain scenarios. A malicious client may be able to pollute Object.prototype in gateway directly by crafting operations with field aliases and/or variable names that target prototype-inheritable properties. Alternatively, if a subgraph were to be compromised by a malicious actor, they may be able to pollute Object.prototype in gateway by crafting JSON response payloads that target prototype-inheritable properties. This vulnerability is fixed in 2.9.6, 2.10.5, 2.11.6, 2.12.3, and 2.13.2.

## Affected vendors and products

- @apollo: federation-internals
- @apollo: gateway
- @apollo: query-planner

## Tracked companies

- [Apollo GraphQL](https://rewindex.com/company/apollo-graphql.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-32621)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-32621)
- [https://github.com/apollographql/federation/security/advisories/GHSA-pfjj-6f4p-rvmh](https://github.com/apollographql/federation/security/advisories/GHSA-pfjj-6f4p-rvmh)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-32621 · Markdown: https://rewindex.com/cve/CVE-2026-32621.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-32621 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:13:39.189Z