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Christian Grothoff
release v1.0.10
07 авг 2026, 23:24
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07 авг 2026, 23:24
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Fri Aug 7 10:15:01 PM CEST 2026 Released GNU libmicrohttpd 1.0.10. This is a bugfix release, fixing minor bugs and expanding the test suite. -- Christian Grothoff Thu Jul 30 05:34:18 PM CEST 2026 Released GNU libmicrohttpd 1.0.9. This is a bugfix release, fixing minor vulnerabilities and expanding the test suite. -- Christian Grothoff Tue Jul 28 06:13:26 PM CEST 2026 Released GNU libmicrohttpd 1.0.8. This is a bugfix release, fixing minor security vulnerabilities and expanding the test suite. -- Christian Grothoff Mon Jul 27 06:13:26 PM CEST 2026 Released GNU libmicrohttpd 1.0.7. This is a bugfix release, fixing modest security vulnerabilities discovered by A. Ramos. -- Christian Grothoff Wed Jul 8 12:47:35 PM CEST 2026 Released GNU libmicrohttpd 1.0.6. This is a bugfix release, fixing minor bugs mostly in error handling, theoretical integer overflows, and rare memory leaks. -- Christian Grothoff Thu Apr 16 10:36:54 AM CEST 2026 Released GNU libmicrohttpd 1.0.5. This is a bugfix release. It fixes a additional HTTP request smuggling issues (CWE-444). -- Christian Grothoff Mon Apr 13 11:42:06 AM CEST 2026 Released GNU libmicrohttpd 1.0.4. This is a bugfix release. It fixes a minor HTTP request smuggling issue (CWE-444). -- Christian Grothoff Thu Apr 2 12:16:28 AM CEST 2026 Released GNU libmicrohttpd 1.0.3. This is a bugfix release. It primarily fixes a list traversal issue that could cause connection handling issues when other connections were suspended. -- Christian Grothoff Mon Jul 14 2025 05:03:07 PM CEST Released GNU libmicrohttpd 1.0.2. This is a bugfix release. It primarily fixes a double-close() bug on bind() errors. -- Christian Grothoff Fri 23 Feb 2024 21:00:00 UZT Released GNU libmicrohttpd 1.0.1. This is a correction release. This release mainly fixes and improves builds with non-default configure parameters. -- Evgeny Grin (Karlson2k) Thu 01 Feb 2024 15:00:00 CET Released GNU libmicrohttpd 1.0.0. This is the first non-bugfix release since version 0.9.75 and the first ever stable release of GNU libmicrohttpd. It is a huge one with new features and fixes. The major changes: * Rewritten parsing of clients' requests, fully aligned with current RFCs (9110 and 9112) requirements. Added detailed control of strict or lenient specification enforcement. Application may choose between more compatible mode or more strict and secure mode. * Reworked Digest Auth, greater enhanced support for current RFC 7617 features. MHD currently is the only known server-side implementation with support for SHA-512/256, userhash and username in extended notation. At the same time the very old RFC2069 is supported, as well as MD5 and SHA-256. * Improved functionality in multi-threading environment, especially with external sockets polling modes. * Reworked Basic Auth, adding new convenient API functions. * Re-implemented GnuTLS initialisation. Now supported libmicrohttpd-specific system-wide configuration, as well as generic GnuTLS system-wide configuration. Application may adjust settings based on system configuration instead of specifying its own full configuration. * Tons of other new functionality and various fixes. For detailed changes see the ChangeLog or Git commit logs. Since last non-bugfix release there are 1062 commits added with 67007 lines insertions and 26616 deletions. -- Evgeny Grin (Karlson2k) Sun 28 May 2023 18:00:00 MSK Released GNU libmicrohttpd 0.9.77. This is mostly a bugfix release. This version created by taking patches from the current development branch and back-porting them on top of version 0.9.76. The most notable changes are: some improvements for Digest and Basic authorizations, fixed efficiency for TLS upgraded connections, fixed processing of folded headers in requests, fixed functionality with blocking sockets, improved and fixed internal test-suite. The more detailed list of the important changes: API changes: + Added new function MHD_get_version_bin(). Improvements and enhancements: * Digest Auth: changed algorithm identifiers in server generated headers from "md5" / "sha-256" to "MD5" / "SHA-256" to better match RFC (while clients should use caseless matching). * Improved Base64 decoding by new implementation with robust input data validation checks. * Improved configure for cross-compiling, for better compatibility with POSIX and for better compatibility with the latest compiler versions. * New internal tests: for Base64 decoding, Basic Auth and folded headers. * Supported new libcurl API in tests to mute deprecation warnings. * Supported ARM and ARM64 for VC compilers. Functionality changes: * any negative number returned by response data generation callback function is treated as an error. Previously negative values except predefined error codes could produce undefined behaviour. * Added handling of "DEBUG" preprocessor macro as an alias of "_DEBUG". Fixes: # Fixed functionality with blocking sockets. # Fixed very inefficient data pumping for upgraded TLS connections. # Fixed processing of folded headers in the requests. # Fixed data races when closing upgraded connection. # Removed duplication of "Connection: upgrade" header. # Digest auth: fixed thread sync to avoid "stale hash" results. # Fixed harmless unwanted extra data processing resulting in triggering of the assert. # Fixed tests for LTO. # Removed removed non-portable functions in examples. # Fixed delayed call of connection notification callback in thread-per-connection mode. # Fixed Address Sanitizer unpoison of memory when memory pool is destroyed. This fixed periodic ASAN error when used for a long time with the sanitizer. # Fixed compiler warnings in library code, examples, tests and configure checks. # New TLS certificates for test-suite: all with SAN fields and SHA-256 hash. # Tests: fixed tests on Darwin 22.x (Ventura). # Tests: redesigned one tests group to avoid stress-testing of the OS. -- Evgeny Grin (Karlson2k) Sun 26 Feb 2023 17:49:30 CET Released GNU libmicrohttpd 0.9.76 hotfix. -CG This is a hotfix release. This only change since previous release is fixed potential DoS vector in MHD_PostProcessor discovered by Gynvael Coldwind and Dejan Alvadzijevic (CVE-2023-27371). While the researchers have not been able to exploit this attack vector when libmicrohttpd is compiled with the standard GNU C library, it is recommended that you update MHD as soon as possible if your applications are using (optional) MHD_PostProcessor functionality. -- Evgeny Grin (Karlson2k) Sun 26 Dec 2021 20:30:00 MSK Released GNU libmicrohttpd 0.9.75 -EG This is a correction release. The main improvement is the implementation of workaround for some OSes (like OpenBSD 7) where "monotonic" clock may jump back. Now MHD is able to automatically detect such situation and recover if the jump is small. This workaround is needed with increased accuracy of connection timeout introduced in previous version, as with lower accuracy (v0.9.73 and before) these jumpbacks were unnoticeable. Other changes: fixed some compiler, Makefile, and configure warnings on specific platforms; one test further improved. -- Evgeny Grin (Karlson2k) Sun 19 Dec 2021 18:30:00 MSK Released GNU libmicrohttpd 0.9.74 This release brings a lot of fixes and improvements, and important new features. The most significant addition is the new experimental implementation of WebSockets contributed by David Gausmann. This implementation is not fully tested yet so currently it is disabled by default. Other changes include a lot of improvements and clarifications in doxy comments in microhttpd.h header file, improved compliance with the RFC HTTP specifications, the new implementation of reply header forming, the new implementation of request chunked encoding parsing, new automatic error replies, internal optimisations, and many important fixes, including fixes for long-standing bugs. More detailed list of notable changes: API changes: + Added new function MHD_get_reason_phrase_len_for(). + Added MHD_CONNECTION_INFO_HTTP_STATUS type of information queried by MHD_get_connection_info(). + Added new response flag MHD_RF_SEND_KEEP_ALIVE_HEADER to force sending of "keep-alive" header even if not required by RFC. + Added new response creation function MHD_create_response_from_buffer_with_free_callback_cls() with custom cleanup callback. + Added new response flag MHD_RF_HTTP_1_0_COMPATIBLE_STRICT with the same functionality as existing MHD_RF_HTTP_VERSION_1_0_ONLY flag. The old flag will be deprecated. + Added new response flag MHD_RF_HTTP_1_0_SERVER with the same functionality as existing MHD_RF_HTTP_VERSION_1_0_RESPONSE flag. The old flag will be deprecated. New features: + Added experimental WebSockets extension with separate header. Disabled by default as it is not fully tested yet. + Added '--enable-sanitizers[=address,undefined,leak,user-poison]' configure parameter (instead of '--enable-sanitizer'), implemented custom memory poisoning for memory pools. Improvements and enhancements: * Doxy function descriptions was corrected, clarified, extended, and improved. Now it should be much easier to learn MHD just by reading the headers. * Completely rewritten reply header forming. New implementation is more robust, simpler maintainable and expandable, and better follows RFC HTTP specifications. * Performance improvements: now HTTP version and request method are decoded one time only (previously MHD used string comparison many times during processing the data). * Rewritten request chunked payload decoding. The new implementation better conforms to the HTTP RFC, detects format problems earlier, replies to the clients with description of detected problems, handles untypical (but syntactically correct) values properly. * Added special replies for wrong/unsupported HTTP versions in requests, broken HTTP chunked encoding in requests, * As required by HTTP RFC, added automatic error replies if client used broken chunked encoding, too large chunk size, too large payload size, or broken Content-Length header. * Optimized connection's memory pool handling. * Changed timeout precision from one second to one millisecond. * Added some checks for incorrect user data, reporting problems in MHD log. * Improved performance of hash calculations functions by using compiler built-ins (if available). * Implemented SHA-1 calculations (required for WebSockets). * Added universal MSVC project that works with any (sufficiently new) version of MSVC. * Developed simple HTTP client to test MHD under very special conditions. * Implemented 45 new tests. * Improved existing tests to test more aspects of MHD. * Added check for correct results of system and libcurl functions. * Response headers are checked during forming of responses. * HTTPS tests were improved. * Added rebuild on W32 of all required files if files are missing. * Many internal optimisations and improvements. Functionality changes: * Keep-alive header is omitted by default for HTTP/1.1 connections. Use of header can be enforced by response flag. * Chunked encoding is used for HTTP/1.1 non-keep-alive connections for responses with unknown size. Previously MHD used "indication of the end of the response by closing connection" in such cases, however it is not correct for HTTP/1.1 connections as per HTTP RFC. * As required by HTTP RFC, use HTTP/1.1 version instead of HTTP/1.0 in reply headers when client is HTTP/1.0 . HTTP/1.0 version can be enforced by response flag. * User response headers are used in replies in the same order as was added by application. * Allowed tab characters in response header values. * All custom "Connection:" response headers are automatically combined into single "Connection:" header. * "keep-alive" token silently dropped from custom "Connection:" response header. "Keep-alive" cannot be enforced and used automatically if possible. * Allow tab character in custom response header value. * Disallow space character in custom response header value. * Do not allow responses with 1xx codes for HTTP/1.0 requests. * Detected and reported incorrect "Upgrade" responses. * W32 targets are changed to Vista+ by default. XP is supported still. Fixes: # Fixed short busy-waiting (up to one second) when connection is going to be expired and closed. # Fixed handling of errors during start of new connection, fixed inability to accept new connections in thread-per-connection mode due to the missing decrement of number of daemon's connections if start of new thread is failed. # Fixed incorrect parsing of LFLF, LFCR, CRCR, and bare CR as single linefeed in request header and request chunked payload. Now only CRLF or bare LF are recognized as linefeed. # Fixed response chunked encoding handling. Now it works properly with non-keep-alive connection, with fixed size replies (if chunked was enforced by header), and in other situations. # Other fixes for chunked replies. # Fixed handling of custom connection timeout in thread-per- connection mode. # Fixed wrongly used MHD_REQUEST_TERMINATED_COMPLETED_OK code for application notification when MHD_REQUEST_TERMINATED_WITH_ERROR code must be used. # Fixed code MHD_REQUEST_TERMINATED_READ_ERROR not reported (code MHD_REQUEST_TERMINATED_WITH_ERROR was incorrectly used instead). # Fixed handling of request chunked encoding with untypical formatting. # Fixed processing of last part of hex-encoded values under certain conditions. # Fixed value returned for MHD_CONNECTION_INFO_REQUEST_HEADER_SIZE. # Fixed returned value for MHD_FEATURE_AUTOSUPPRESS_SIGPIPE on W32, now it is MHD_YES as W32 does not need SIGPIPE suppression. # Fixed portability of bitwise NOT for enums values. # Fixed SHA-256 and MD5 calculations with unaligned data. # Fixed incorrect caseless matching for HTTP version. # Fixed incorrect caseless matching for request method. # Fixed compatibility with old GnuTLS versions. # Fixed compiler warnings on 32-bits platforms. # Fixed blocking sockets setting in tests and examples for W32. # Fixed examples to really use libmagic if present. # HTTPS tests were fixed. # Fixed libcurl test with case-insensitive match for HTTP methods, method names must use case-sensitive match. # Fixed tests compatibility with old libcurl versions. # Fixed build on W32 with llvm-dlltool (this tool is too oversimplified) -- Evgeny Grin (Karlson2k) Sun 25 Apr 2021 14:00:00 MSK Released GNU libmicrohttpd 0.9.73 This release brings new features, improvements, and a few fixes. The most important addition is the new function for vector-backed responses, based on the patch contributed by NASA engineers. Other changes include compatibility with autoconf 2.70+, improved testsuite compatibility with CI systems, fixed and improved MSVC builds, and implementation of ALPN support. More detailed list of notable changes: API changes: + Added new function MHD_create_response_from_iovec(), based on the patch provided by Lawrence Sebald and Damon N. Earp from NASA. + Added MHD_OPTION_SIGPIPE_HANDLED_BY_APP daemon option. + Added new function MHD_run_wait(). + Added MHD_OPTION_TLS_NO_ALPN to disable usage of ALPN even if it is supported by TLS library. New features: + Added '--enable-heavy-tests' configure parameter (disabled by default). + Implemented support for ALPN. Improvements and enhancements: * Return timeout of zero also for connections awaiting cleanup. * Compatibility with autoconf >=2.70, used new autoconf features. * Warn user when custom logger option is not the first option. * Added information to the header about minimal MHD version when particular symbols were introduced. * Updated test certificates to be compatible with modern browsers. * Added on-fly detection of UNIX domain sockets and pipes, MHD does not try to use TCP/IP-specific socket options on them. * Report more detailed error description in the MHD log for send and receive errors. * Enabled bind port autodetection for MSVC builds. Fixes: # Fix PostProcessor to always properly stop iteration when application callback tells it to do so. # Fixed MD5 digest authorization broken when compiled without variable length arrays support (notably with MSVC). # Fixed detection of type of send errors on W32. -- Evgeny Grin (Karlson2k) Mon 28 Dec 2020 21:36:00 MSK Released GNU libmicrohttpd 0.9.72 This release is mostly a bugfix release, with greatly improved compatibility with various OSes/kernels, including FreeBSD, Windows, OpenBSD, NetBSD, Darwin (macOS), Solaris. Performance is improved, especially with HTTPS connections and stay-alive HTTP connections. Notable changes since version 0.9.71: API changes: + New function MHD_create_response_from_pipe() Improvements and enhancements: * Fully rewritten code for buffering/pushing from kernel network buffers for compatibility with various OSes. Reduced number of additional sys-calls, network is better utilized, responses are delivered faster. * Restored optimal sendfile() usage on FreeBSD. * MHD now takes care about SIGPIPE handling by blocking it in internal threads and avoiding functions (like sendfile()) that could generate SIGPIPE when blocking of this signal is not possible. Fixes: # Fixed crash in PostProcessor. # Fixed several resources leaks in corner cases. # Improved thread sync, thread safety and fixed one use-after-free under special conditions during stopping of daemon. # Updated HTTP status codes, header names and methods from the registries. # Fixed functioning without listen socket and with internal threads. # Fixed streaming of chunked responses for both HTTP and HTTPS. # Various compatibility fixes. -- Evgeny Grin (Karlson2k) Tue Jan 9 20:52:48 MST 2007 Project posted.