Monkey Server security vulnerabilities

Monkey Server is an open-source HTTP server developed by Monkey I/O. There is a security vulnerability in Monkey Server, which stems from a stack overflow in the mkhttpindexlookup function. This vulnerability could lead to denial-of-service attacks...

CVE-2025-63658: Stack-based Buffer Overflow

A stack overflow in the mkhttpindexlookup function mkserver/mkhttp.c of monkey commit f37e984 allows attackers to cause a Denial of Service DoS via sending a crafted HTTP request to the server...

CVE-2025-63656: Out-of-bounds Read

An out-of-bounds read in the headercmp function mkserver/mkhttpparser.c of monkey commit f37e984 allows attackers to cause a Denial of Service DoS via sending a crafted HTTP request to the server...

CVE-2025-63652: Use After Free

A use-after-free in the mkhttprequestend function mkserver/mkhttp.c of monkey commit f37e984 allows attackers to cause a Denial of Service DoS via sending a crafted HTTP request to the server...

CVE-2025-63651: Use After Free

A use-after-free in the mkstringcharsearch function mkcore/mkstring.c of monkey commit f37e984 allows attackers to cause a Denial of Service DoS via sending a crafted HTTP request to the server...

CVE-2025-63649: Out-of-bounds Read

An out-of-bounds read in the httpparsertransferencodingchunked function mkserver/mkhttpparser.c of monkey commit f37e984 allows attackers to cause a Denial of Service DoS via sending a crafted POST request to the server...

CVE-2025-63658

A stack overflow in the mkhttpindexlookup function mkserver/mkhttp.c of monkey commit f37e984 allows attackers to cause a Denial of Service DoS via sending a crafted HTTP request to the server...

CVE-2025-63657

An out-of-bounds read in the mkmimetypefind function mkserver/mkmimetype.c of monkey commit f37e984 allows attackers to cause a Denial of Service DoS via sending a crafted HTTP request to the server...

CVE-2025-63652

A use-after-free in the mkhttprequestend function mkserver/mkhttp.c of monkey commit f37e984 allows attackers to cause a Denial of Service DoS via sending a crafted HTTP request to the server...

CVE-2025-63651

A use-after-free in the mkstringcharsearch function mkcore/mkstring.c of monkey commit f37e984 allows attackers to cause a Denial of Service DoS via sending a crafted HTTP request to the server...

CVE-2025-63656

The Monkey Server (specifically monkey commit f37e984 ) contains an out-of-bounds read vulnerability within the header_cmp function located in mk_server/mk_http_parser.c. An attacker can exploit this by sending a crafted HTTP request to the server, which can result in a Denial of Service (DoS) . ...

CVE-2025-63658

The Monkey Server (an open-source HTTP server developed by Monkey I/O) is vulnerable to a stack overflow in the mk_http_index_lookup function located in mk_server/mk_http.c. This flaw exists in monkey commit f37e984 . An unauthenticated attacker can exploit this vulnerability by sending a crafted...

CVE-2025-63655

The Monkey HTTP server is vulnerable to a NULL pointer dereference within the mk_http_range_parse function (located in mk_server/mk_http.c) in versions prior to commit f37e984 . An attacker can exploit this flaw by sending a crafted HTTP request to the server, resulting in a Denial of Service (Do...

CVE-2025-63658

A stack overflow in the mkhttpindexlookup function mkserver/mkhttp.c of monkey commit f37e984 allows attackers to cause a Denial of Service DoS via sending a crafted HTTP request to the server...

CVE-2025-63655

A NULL pointer dereference in the mkhttprangeparse function mkserver/mkhttp.c of monkey commit f37e984 allows attackers to cause a Denial of Service DoS via sending a crafted HTTP request to the server...

CVE-2025-63649

An out-of-bounds read in the httpparsertransferencodingchunked function mkserver/mkhttpparser.c of monkey commit f37e984 allows attackers to cause a Denial of Service DoS via sending a crafted POST request to the server...

PT-2026-5341

Name of the Vulnerable Software and Affected Versions Monkey versions prior to commit f37e984 Description A flaw exists in the mk http range parse function located in mk server/mk http.c that can lead to a Denial of Service DoS. This occurs when a specially crafted HTTP request is sent to the...

PT-2026-5344

A stack overflow in the mk http index lookup function mk server/mk http.c of monkey commit f37e984 allows attackers to cause a Denial of Service DoS via sending a crafted HTTP request to the server...

EUVD-2025-206521

A stack overflow in the mkhttpindexlookup function mkserver/mkhttp.c of monkey commit f37e984 allows attackers to cause a Denial of Service DoS via sending a crafted HTTP request to the server...

EUVD-2025-206525

A NULL pointer dereference in the mkhttprangeparse function mkserver/mkhttp.c of monkey commit f37e984 allows attackers to cause a Denial of Service DoS via sending a crafted HTTP request to the server...