What is the authenticity of the supplication: “O Allah, invalidate my evil eye and my envy, and the attachment of my soul to those whom I have afflicted with it, whether intentionally or unintentionally”?

There is no origin for this supplication from the Prophet, peace and blessings be upon him, nor from any of his companions, and it is not prescribed to adhere to it. Envy and the evil eye are blameworthy traits, and Islam legislated seeking refuge from them with Surahs Al-Falaq and An-Nas, which are the best means by which those who seek refuge can do so. Whoever fears being afflicted by the evil eye should strive against themselves and restrain them from evil, repel their harm from Muslims, and invoke blessings upon what they admire. Among the comprehensive Prophetic supplications are: "O Allah, I seek refuge in You from reprehensible morals, deeds, and whims," and "O Allah, I seek refuge in You from the evil of my hearing, and from the evil of my sight, and from the evil of my tongue, and from the evil of my heart, and from the evil of my semen," and others. There is no objection to supplicating with the wording mentioned in the question if its meaning is sound and appropriate for the situation, but it should not be made a fixed regular litany like the Prophetic supplications.