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Fencer Vulns
critical 9.9

CVE-2026-32621 json

Apollo Federation has prototype pollution via incomplete key sanitization

published 2026-03-13 7 mo ago modified 2026-06-17 4 mo ago also GHSA-pfjj-6f4p-rvmh , EUVD-2026-12135

cvss
9.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 48%
public exploits
0
none known

Summary

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.

Patch / fix

  • npm @apollo/federation-internals 2.9.6, 2.10.5, 2.11.6, 2.12.3, 2.13.2
  • npm @apollo/gateway 2.9.6, 2.10.5, 2.11.6, 2.12.3, 2.13.2
  • npm @apollo/query-planner 2.9.6, 2.10.5, 2.11.6, 2.12.3, 2.13.2

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
7 mo ago

Exploit prediction

0.60% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
GitHub 3.1 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

Affected packages

ecosystem package affected fixed in
npm @apollo/federation-internals
<2.9.6
>=2.10.0, <2.10.5
>=2.11.0, <2.11.6
>=2.12.0, <2.12.3
>=2.13.0, <2.13.2
2.9.6
2.10.5
2.11.6
2.12.3
2.13.2
npm @apollo/gateway
<2.9.6
>=2.10.0, <2.10.5
>=2.11.0, <2.11.6
>=2.12.0, <2.12.3
>=2.13.0, <2.13.2
2.9.6
2.10.5
2.11.6
2.12.3
2.13.2
npm @apollo/query-planner
<2.9.6
>=2.10.0, <2.10.5
>=2.11.0, <2.11.6
>=2.12.0, <2.12.3
>=2.13.0, <2.13.2
2.9.6
2.10.5
2.11.6
2.12.3
2.13.2

Affected products

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

Classification

Weakness
  • CWE-1321 Improperly Controlled Modification of Object Prototype Attributes

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.