FCGI versions 0.44 through 0.82, for Perl, include a vulnerable version of the FastCGI fcgi2 (aka fcgi) library. The included FastCGI library is affected by CVE-2025-23016, causing an integer overflow (and resultant heap-based buffer overflow) via crafted nameLen or valueLen values in data to the IPC socket. This occurs in ReadParams in fcgiapp.c.
o Fixes for pure perl version based on report and patch from "Kurtis D. Rader" <kdrader@us.ibm.com> o FCGI_UndoBinding perl 5.8.0 compatibility Reported by Marko Asplund <aspa@kronodoc.fi> o Fix problem with fcgi_config.h on win32. Reported by Igor Franchuk <softdep@rol.ru> o Add minimal tests