CVE-2026-32621: @apollo Federation-Internals

Critical severity, CVSS 9.9. EPSS: 0.6% chance of exploitation in the next 30 days.

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 products

• @apollo Federation-Internals: from 2.13.0-preview.0, before 2.13.2 (fixed in 2.13.2); from 2.12.0-preview.0, before 2.12.3 (fixed in 2.12.3); from 2.11.0-preview.0, before 2.11.6 (fixed in 2.11.6); from 2.10.0-alpha.0, before 2.10.5 (fixed in 2.10.5); before 2.9.6 (fixed in 2.9.6)
• @apollo Gateway: from 2.13.0-preview.0, before 2.13.2 (fixed in 2.13.2); from 2.12.0-preview.0, before 2.12.3 (fixed in 2.12.3); from 2.11.0-preview.0, before 2.11.6 (fixed in 2.11.6); from 2.10.0-alpha.0, before 2.10.5 (fixed in 2.10.5); before 2.9.6 (fixed in 2.9.6)
• @apollo Query-Planner: from 2.13.0-preview.0, before 2.13.2 (fixed in 2.13.2); from 2.12.0-preview.0, before 2.12.3 (fixed in 2.12.3); from 2.11.0-preview.0, before 2.11.6 (fixed in 2.11.6); from 2.10.0-alpha.0, before 2.10.5 (fixed in 2.10.5); before 2.9.6 (fixed in 2.9.6)

Published 2026-03-16. Last modified 2026-06-17.