Kabrel I was the uninhabited first planet in the Kabrel system. This system was located in Federation space, near the Federation-Cardassian border in the 2370s, in the Alpha Quadrant. The planet was home to simple protozoa and tri-nucleic fungi.
In 2374, the Dominion attempted to negotiate with the Federation for control of Kabrel I, as they could utilize the fungi to replenish their supplies of ketracel-white for an indefinite period. (DS9: "Statistical Probabilities")
This planet's quadrant of origin is inferred based on the position of the Cardassian Union as seen in the star chart appearing in the Star Trek: Picard episode "Maps and Legends".
The name of the planet was not mentioned in the episode, where it was described as the "first planet" of the system, and was from the Star Trek Encyclopedia, 4th ed., vol. 1, p. 397.