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HAProxy - Load balancer
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Willy Tarreau b6995d25d1 BUG/MEDIUM: mux-h2: fix the body_len to check when parsing request trailers 
The h2 content-length validation in commit d12edebe4a ("BUG/MAJOR:
mux-h2: detect incomplete transfers on HEADERS frames as well") was
insufficient. The content-length check is still ineffective on request
trailers and it could not work by default due to the fact that the
default body_len is used in h2c_frt_handle_headers() when processing
trailers, instead of passing h2s->body_len, which was necessarily parsed
before reaching trailers. Let's fix this point first, otherwise fixing
the second issue would break trailers.

Many thanks to Pratham Gupta / alchemy1729 for spotting and analyzing
this problem, and for providing a lightweight reproducer to illustrate
the problem!

This fix must be backported to all versions where the fix above was
backported (i.e. all).
2026-05-04 14:33:22 +02:00
.github CI: github: add DEBUG_STRICT=2 to ASAN jobs 2026-04-30 17:46:30 +02:00
addons CLEANUP: otel: move opentelemetry outside haproxy sources 2026-05-04 14:18:40 +02:00
admin CLEANUP: fix typos and spelling in comments and documentation 2026-03-30 09:24:19 +02:00
dev CLEANUP: fix typos and spelling in comments and documentation 2026-03-30 09:24:19 +02:00
doc [RELEASE] Released version 3.4-dev10 2026-04-29 15:51:32 +02:00
examples EXAMPLES: ssl: keylog entries are greater than 1024 2026-04-14 16:24:28 +02:00
include BUG/MINOR: quic: fix buffer overflow with sockaddr_in46 2026-05-04 10:49:49 +02:00
reg-tests BUG/MEDIUM: cli: fix master CLI connection slot leak on client disconnect 2026-04-30 17:06:19 +02:00
scripts BUG/MINOR: reg-tests: make shell syntax errors fatal 2026-04-22 15:18:22 +02:00
src BUG/MEDIUM: mux-h2: fix the body_len to check when parsing request trailers 2026-05-04 14:33:22 +02:00
tests TESTS: quic: add unit-tests for QUIC TX part 2025-09-08 14:49:03 +02:00
.cirrus.yml CI: cirrus-ci: bump FreeBSD image to 14-3 2025-10-09 14:06:48 +02:00
.gitattributes MINOR: Configure the cpp userdiff driver for *.[ch] in .gitattributes 2021-02-22 18:17:57 +01:00
.gitignore MINOR: tevt/dev: Add term_events tool 2025-01-31 10:41:50 +01:00
.mailmap DOC: update Tim's address in .mailmap 2021-09-16 09:14:14 +02:00
.travis.yml MEDIUM: mworker: remove USE_SYSTEMD requirement for -Ws 2024-11-20 12:07:38 +01:00
BRANCHES DOC: clarify the experimental status for certain features 2025-10-17 18:41:13 +02:00
BSDmakefile BUILD: makefile: commit the tiny FreeBSD makefile stub 2023-05-24 17:17:36 +02:00
CHANGELOG [RELEASE] Released version 3.4-dev10 2026-04-29 15:51:32 +02:00
CONTRIBUTING CLEANUP: assorted typo fixes in the code and comments 2025-04-02 11:12:20 +02:00
INSTALL MINOR: version: mention that it's development again 2025-11-26 16:11:47 +01:00
LICENSE LICENSE: add licence exception for OpenSSL 2012-09-07 13:52:26 +02:00
MAINTAINERS MAJOR: spoe: Let the SPOE back into the game 2024-05-22 09:04:38 +02:00
Makefile BUILD: otel: removed USE_OTEL, addon is now built via EXTRA_MAKE 2026-05-04 14:15:17 +02:00
README.md CI: github: add cross-zoo.yml in README.md 2026-04-20 11:47:20 +02:00
SUBVERS BUILD: use format tags in VERDATE and SUBVERS files 2013-12-10 11:22:49 +01:00
VERDATE [RELEASE] Released version 3.4-dev10 2026-04-29 15:51:32 +02:00
VERSION [RELEASE] Released version 3.4-dev10 2026-04-29 15:51:32 +02:00

README.md

HAProxy

AWS-LC Illumos NetBSD CrossCompile FreeBSD VTest

HAProxy logo

HAProxy is a free, very fast and reliable reverse-proxy offering high availability, load balancing, and proxying for TCP and HTTP-based applications.

Installation

The INSTALL file describes how to build HAProxy. A list of packages is also available on the wiki.

Getting help

The discourse and the mailing-list are available for questions or configuration assistance. You can also use the slack or IRC channel. Please don't use the issue tracker for these.

The issue tracker is only for bug reports or feature requests.

Documentation

The HAProxy documentation has been split into a number of different files for ease of use. It is available in text format as well as HTML. The wiki is also meant to replace the old architecture guide.

Please refer to the following files depending on what you're looking for:

  • INSTALL for instructions on how to build and install HAProxy
  • BRANCHES to understand the project's life cycle and what version to use
  • LICENSE for the project's license
  • CONTRIBUTING for the process to follow to submit contributions

The more detailed documentation is located into the doc/ directory:

License

HAProxy is licensed under GPL 2 or any later version, the headers under LGPL 2.1. See the LICENSE file for a more detailed explanation.