munin-cgi-graph for Munin 2.0 rc4 does not delete temporary files, which allows remote attackers to cause a denial of service (disk consumption) via many requests to an image with unique parameters.
munin-cgi-graph in Munin 2.0 rc4 allows remote attackers to cause a denial of service (disk or memory consumption) via many image requests with large values in the (1) size_x or (2) size_y parameters.