CVE-2026-54164: API Platform Core: Relation IRIs are not type-checked: a related resource can be denormalised as the wrong resource type (type confusion)

medium Affects api-platform/core. Feed 2026.10.29.1, updated 2026-10-28; published 2026-08-07.

API Platform Core: Relation IRIs are not type-checked: a related resource can be denormalised as the wrong resource type (type confusion)

Package: api-platform/core Composer
Affected versions: <4.1.30 or >=4.2.0 and <4.2.26 or >=4.3.0 and <4.3.12
Fixed in: 4.1.30, 4.2.26, 4.3.12
Severity: medium CVSS 6.5
Exploitation: not on CISA KEV · EPSS 0% (26.9th percentile)
Published: 2026-08-07
Source: osv.dev

References

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