This issue was addressed by removing the vulnerable code. This issue is fixed in iOS 27 and iPadOS 27, macOS Golden Gate 27, visionOS 27. An app may be able to delete credentials stored in Keychain.

{
                    "vendor": "Apple",
                    "product": "iOS and iPadOS",
                    "versions": [
                        {
                            "version": "0",
                            "status": "affected",
                            "lessThan": "27",
                            "versionType": "custom"
                        }
                    ]
                }

{
                    "vendor": "Apple",
                    "product": "macOS",
                    "versions": [
                        {
                            "version": "0",
                            "status": "affected",
                            "lessThan": "27",
                            "versionType": "custom"
                        }
                    ]
                }

{
                    "vendor": "Apple",
                    "product": "visionOS",
                    "versions": [
                        {
                            "version": "0",
                            "status": "affected",
                            "lessThan": "27",
                            "versionType": "custom"
                        }
                    ]
                }