The foreach function in ext/ccsv.c in Ccsv 1.1.0 allows remote attackers to cause a denial of service (double free and application crash) or possibly have unspecified other impact via a crafted file. NOTE: This has been disputed and it is argued that this is not present in version 1.1.0.
https://github.com/evan/ccsv/issues/15
https://github.com/evan/ccsv/commit/24e0b9b94c44a15b23475e821366239d53764dbd