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 Stop leaking information across requests when using the deprecated and undocumented old FCGI interface. This is CVE-2011-2766. o Only discard input stream if FCGI_KEEP_CONN is set in FCGI_BeginRequestBody flags.