Core:
    Fixed bug #71876 (Memory corruption htmlspecialchars(): charset `*' not supported).
    Fixed bug #79146 (cscript can fail to run on some systems).
    Fixed bug #78323 (Code 0 is returned on invalid options).
    Fixed bug #76047 (Use-after-free when accessing already destructed backtrace arguments).
CURL:
    Fixed bug #79078 (Hypothetical use-after-free in curl_multi_add_handle()).
Intl:
    Fixed bug #79212 (NumberFormatter::format() may detect wrong type).
Libxml:
    Fixed bug #79191 (Error in SoapClient ctor disables DOMDocument::save()).
MBString:
    Fixed bug #79154 (mb_convert_encoding() can modify $from_encoding).
MySQLnd:
    Fixed bug #79084 (mysqlnd may fetch wrong column indexes with MYSQLI_BOTH).
OpenSSL:
    Fixed bug #79145 (openssl memory leak).
Phar:
    Fixed bug #79082 (Files added to tar with Phar::buildFromIterator have all-access permissions). (CVE-2020-7063)
    Fixed bug #79171 (heap-buffer-overflow in phar_extract_file). (CVE-2020-7061)
    Fixed bug #76584 (PharFileInfo::decompress not working).
Reflection:
    Fixed bug #79115 (ReflectionClass::isCloneable call reflected class __destruct).
Session:
    Fixed bug #79221 (Null Pointer Dereference in PHP Session Upload Progress). (CVE-2020-7062)
SPL:
    Fixed bug #79151 (heap use after free caused by spl_dllist_it_helper_move_forward).
Standard:
    Fixed bug #78902 (Memory leak when using stream_filter_append).
Testing:
    Fixed bug #78090 (bug45161.phpt takes forever to finish).
XSL:
    Fixed bug #70078 (XSL callbacks with nodes as parameter leak memory).