Julia Michalska reported for The Art Newspaper on June 11 in "Matisse painting in Gurlitt Hoard was Nazi loot, researchers find" that the painting by Henri Matisse titled Femme Assise (1921) had likely once belonged to Paul Rosenberg, a Jewish art dealer in Paris until the Nazi Occupation in 1940:

Ingeborg Berggreen Merkel, the head of the task force, said in a press statement released today: “Even though it could not be documented with absolute certainty how the work came into [Cornelius Gurlitt’s father] Hildebrand Gurlitt’s possession, the task force has concluded that the work is Nazi loot and was taken from its rightful owner Paul Rosenberg.” Merkel added that the final decision on what will happen to the painting “lies in the hands of the heirs of Cornelius Gurlitt, who, shortly before his death, committed himself to returning looted works in line with the Washington Principles. This commitment also binds his heirs”.

According to the Lost Art Internet Database website, the "Schwabing Art Trove" (named after the neighborhood where Cornelius Gurlitt resided) Task Force is examining the ownership of 590 works that may have been "confiscated" by the Nazis.

Here's a link to the the press release issued in German.

For further information on the Gurlitt case, the Central Registry of Information on Looted Cultural Property (1933-1945) you may go here on their website.