What is CVE-2026-54164?

CVE-2026-54164 is a medium-severity vulnerability in Api-platform Core, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 6.5/10. Published 2026-07-01.

How severe is CVE-2026-54164?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Api-platform Core

CVE-2026-54164

API Platform Core is a system to create hypermedia-driven REST and GraphQL APIs. In versions prior to 4.1.30, 4.2.26 and 4.3.12, the serializer's AbstractItemNormalizer does not validate the resource type returned when resolving relation I…

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

Affected products

Api-platform Core — versions < 4.1.30, >= 4.2.0, < 4.2.26, >= 4.3.0, < 4.3.12

Weakness classification (CWE)

CWE-843 — Access of Resource Using Incompatible Type (Type Confusion)

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-54164?: CVE-2026-54164 is a medium-severity vulnerability in Api-platform Core, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 6.5/10. Published 2026-07-01.
How severe is CVE-2026-54164?: Medium severity. CVSS v3 base score is 6.5 out of 10.