package/cpp-httplib: security bump to v0.37.2

See the release notes of intermediate versions:
- https://github.com/yhirose/cpp-httplib/releases/tag/v0.28.0
- https://github.com/yhirose/cpp-httplib/releases/tag/v0.29.0
- https://github.com/yhirose/cpp-httplib/releases/tag/v0.30.0
- https://github.com/yhirose/cpp-httplib/releases/tag/v0.30.1
- https://github.com/yhirose/cpp-httplib/releases/tag/v0.30.2
- https://github.com/yhirose/cpp-httplib/releases/tag/v0.31.0
- https://github.com/yhirose/cpp-httplib/releases/tag/v0.32.0
- https://github.com/yhirose/cpp-httplib/releases/tag/v0.33.0
- https://github.com/yhirose/cpp-httplib/releases/tag/v0.33.1
- https://github.com/yhirose/cpp-httplib/releases/tag/v0.34.0
- https://github.com/yhirose/cpp-httplib/releases/tag/v0.35.0
- https://github.com/yhirose/cpp-httplib/releases/tag/v0.36.0
- https://github.com/yhirose/cpp-httplib/releases/tag/v0.37.0
- https://github.com/yhirose/cpp-httplib/releases/tag/v0.37.1
- https://github.com/yhirose/cpp-httplib/releases/tag/v0.37.2

This fixes numerous vulnerabilities:

- CVE-2026-21428:
    cpp-httplib is a C++11 single-file header-only cross platform
    HTTP/HTTPS library. Prior to version 0.30.0, the ``write_headers``
    function does not check for CR & LF characters in user supplied
    headers, allowing untrusted header value to escape header lines. This
    vulnerability allows attackers to add extra headers, modify request
    body unexpectedly & trigger an SSRF attack. When combined with a
    server that supports http1.1 pipelining (springboot, python twisted
    etc), this can be used for server side request forgery (SSRF). Version
    0.30.0 fixes this issue.
    https://www.cve.org/CVERecord?id=CVE-2026-21428

- CVE-2026-22776:
    cpp-httplib is a C++11 single-file header-only cross platform
    HTTP/HTTPS library. Prior to version 0.30.1, a Denial of Service (DoS)
    vulnerability exists in cpp-httplib due to the unsafe handling of
    compressed HTTP request bodies (Content-Encoding: gzip, br, etc.). The
    library validates the payload_max_length against the compressed data
    size received from the network, but does not limit the size of the
    decompressed data stored in memory.
    https://www.cve.org/CVERecord?id=CVE-2026-22776

- CVE-2026-28434:
    cpp-httplib is a C++11 single-file header-only cross platform
    HTTP/HTTPS library. Prior to 0.35.0, when a request handler throws a
    C++ exception and the application has not registered a custom
    exception handler via set_exception_handler(), the library catches the
    exception and writes its message directly into the HTTP response as a
    header named EXCEPTION_WHAT. This header is sent to whoever made the
    request, with no authentication check and no special configuration
    required to trigger it. The behavior is on by default. A developer who
    does not know to opt in to set_exception_handler() will ship a server
    that leaks internal exception messages to any client. This
    vulnerability is fixed in 0.35.0.
    https://www.cve.org/CVERecord?id=CVE-2026-28434

- CVE-2026-28435:
    cpp-httplib is a C++11 single-file header-only cross platform
    HTTP/HTTPS library. Prior to 0.35.0, cpp-httplib (httplib.h) does not
    enforce Server::set_payload_max_length() on the decompressed request
    body when using HandlerWithContentReader (streaming ContentReader)
    with Content-Encoding: gzip (or other supported encodings). A small
    compressed payload can expand beyond the configured payload limit and
    be processed by the application, enabling a payload size limit bypass
    and potential denial of service (CPU/memory exhaustion). This
    vulnerability is fixed in 0.35.0.
    https://www.cve.org/CVERecord?id=CVE-2026-28435

- CVE-2026-29076:
    cpp-httplib is a C++11 single-file header-only cross platform
    HTTP/HTTPS library. Prior to version 0.37.0, cpp-httplib uses
    std::regex (libstdc++) to parse RFC 5987 encoded filename* values in
    multipart Content-Disposition headers. The regex engine in libstdc++
    implements backtracking via deep recursion, consuming one stack frame
    per input character. An attacker can send a single HTTP POST request
    with a crafted filename* parameter that causes uncontrolled stack
    growth, resulting in a stack overflow (SIGSEGV) that crashes the
    server process. This issue has been patched in version 0.37.0.
    https://www.cve.org/CVERecord?id=CVE-2026-29076

- CVE-2026-31870:
    cpp-httplib is a C++11 single-file header-only cross platform
    HTTP/HTTPS library. Prior to 0.37.1, when a cpp-httplib client uses
    the streaming API (httplib::stream::Get, httplib::stream::Post, etc.),
    the library calls std::stoull() directly on the Content-Length header
    value received from the server with no input validation and no
    exception handling. std::stoull throws std::invalid_argument for non-
    numeric strings and std::out_of_range for values exceeding ULLONG_MAX.
    Since nothing catches these exceptions, the C++ runtime calls
    std::terminate(), which kills the process with SIGABRT. Any server the
    client connects to — including servers reached via HTTP redirects,
    third-party APIs, or man-in-the-middle positions can crash the client
    application with a single HTTP response. No authentication is
    required. No interaction from the end user is required. The crash is
    deterministic and immediate. This vulnerability is fixed in 0.37.1.
    https://www.cve.org/CVERecord?id=CVE-2026-31870

- CVE-2026-32627:
    cpp-httplib is a C++11 single-file header-only cross platform
    HTTP/HTTPS library. Prior to 0.37.2, when a cpp-httplib client is
    configured with a proxy and set_follow_location(true), any HTTPS
    redirect it follows will have TLS certificate and hostname
    verification silently disabled on the new connection. The client will
    accept any certificate presented by the redirect target — expired,
    self-signed, or forged — without raising an error or notifying the
    application. A network attacker in a position to return a redirect
    response can fully intercept the follow-up HTTPS connection, including
    any credentials or session tokens in flight. This vulnerability is
    fixed in 0.37.2.
    https://www.cve.org/CVERecord?id=CVE-2026-32627

Signed-off-by: Titouan Christophe <titouan.christophe@mind.be>
Signed-off-by: Julien Olivain <ju.o@free.fr>

package/cpp-httplib/cpp-httplib.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-CPP_HTTPLIB_VERSION = 0.27.0
+CPP_HTTPLIB_VERSION = 0.37.2
 CPP_HTTPLIB_SITE = $(call github,yhirose,cpp-httplib,v$(CPP_HTTPLIB_VERSION))
 CPP_HTTPLIB_LICENSE = MIT
 CPP_HTTPLIB_LICENSE_FILES = LICENSE