The API Platform serializer's AbstractItemNormalizer does not validate the resource type returned when resolving relation IRIs, allowing type confusion where a resource of an unintended type can be silently assigned to a relation property.
#[ApiProperty(security: …)] is evaluated per request to decide whether a property is exposed. The componentsCache arrays in ApiPlatform\JsonApi\Serializer\ItemNormalizer and ApiPlatform\Hal\Serializer\ItemNormalizer are keyed on $context['cache_key'], which is set unconditionally before delegating to the parent normalizer. The component structure (attributes, relationships, links) computed for one request can therefore be reused for a subsequent request whose user has a different set of accessible properties. A user with lower privileges may end up seeing …
Using the Relay special node type you can bypass the configured security on an operation.
It grants access to properties that it should not.
Exception messages, that are not HTTP exceptions, are visible in the JSON error response.
A security check that gets called after GraphQl resolvers is always replaced by another one as there's no break in this clause: https://github.com/api-platform/core/pull/6444/files#diff-09e3c2cfe12a2ce65bd6c983c7ca6bfcf783f852b8d0554bb938e8ebf5e5fa65R56 https://github.com/soyuka/core/blob/7e2e8f9ff322ac5f6eb5f65baf432bffdca0fd51/src/Symfony/Security/State/AccessCheckerProvider.php#L49-L57
API Platform Core is the server component of API Platform: hypermedia and GraphQL APIs. Resource properties secured with the security option of the ApiPlatform\Metadata\ApiProperty attribute can be disclosed to unauthorized users. The problem affects most serialization formats, including raw JSON, which is enabled by default when installing API Platform. Custom serialization formats may also be impacted. Only collection endpoints are affected by the issue, item endpoints are not. The JSON-LD …
API Platform contains an Incorrect Access Control vulnerability in GraphQL delete mutations that can result in a user authorized to delete a resource can delete any resource. This attack appears to be exploitable via the user must be authorized.