HAProxy known bugs for version v3.1.9 (maintenance branch 3.1) :  28 

This version (3.1.9) is a release belonging to maintenance branch 3.1 whose latest version is 3.1.10. If your version is not the last one in the maintenance branch, you are missing fixes for known bugs, and by not updating you are needlessly taking the responsibility for the risk of unexpected service outages and exposing your web site to possible security issues.

The HAProxy development team takes a great care of maintaining stable versions so that all users can apply bug fixes without having to take the risk of upgrading to a new branch. In turn users are expected to apply the fixes when the development team estimates that they were worth being backported to stable branches.

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Other versions in the same branch

This branch contains the following releases :

DateVersionComment
2025-11-073.1.10 ⇐ last
2025-10-033.1.9 ⇐ yours
2025-06-023.1.8 
2025-04-173.1.7 
2025-03-203.1.6 
2025-02-203.1.5 
2025-02-193.1.4 
2025-01-293.1.3 
2025-01-083.1.2 
2024-12-113.1.1 
2024-11-263.1.0 

Known bugs affecting this version, and already fixed in the maintenance branch

These fixes have already been queued for a more recent 3.1 version. Some of them might have already been released in a more recent version than yours, and other ones might still be pending in the maintenance branch for a future release. The list may be empty if you're already on the latest version and no new fix was backported.

Bugs are almost always tagged with a severity (some people forget the severity tag when the bug is minor). The following severities are used :

Total known bugs in this version by category :

TotalCRITICALMAJORMEDIUMMINOR
28 0 3 15 10

Click on the subjects below to get the full description of the bug :

Merge dateSubject - Severity (minor, medium, major, critical)
2025-11-05BUG/MEDIUM: connections: permit to permanently remove an idle conn
2025-11-05BUG/MEDIUM: mux-h2: make sure not to move a dead connection to idle
2025-11-05BUG/MEDIUM: mux-h1: fix 414 / 431 status code reporting
2025-11-05BUG/MINOR: ssl: returns when SSL_CTX_new failed during init
2025-11-05BUG/MINOR: init: Do not close previously created fd in stdio_quiet
2025-11-05BUG/MEDIUM: ssl: Crash because of dangling ckch_store reference in a ckch instance
2025-10-27BUG/MEDIUM: cli: do not return ACKs one char at a time
2025-10-27BUG/MEDIUM: mt_list: Use atomic operations to prevent compiler optims
2025-10-27BUG/MINOR: stick-tables: properly index string-type keys
2025-10-27BUG/MEDIUM: applet: Improve again spinning loops detection with the new API
2025-10-27BUG/MEDIUM: mt_lists: Avoid el->prev = el->next = el
2025-10-27BUG/MEDIUM: build: limit excessive and counter-productive gcc-15 vectorization
2025-10-27BUG/MAJOR: quic: use ncbmbuf for CRYPTO handling
2025-10-27BUG/MEDIUM: h3: properly encode response after interim one in same buf
2025-10-27BUG/MAJOR: quic: uninitialized quic_conn_closed struct members
2025-10-27BUG/MEDIUM: mt_list: Make sure not to unlock the element twice
2025-10-27BUG/MEDIUM: threads/config: drop absent threads from thread groups
2025-10-27BUG/MINOR: quic: check applet_putchk() for 'show quic' first line
2025-10-27BUG/MEDIUM: stick-tables: Don't forget to dec count on failure.
2025-10-17BUG/MINOR: quic: too short PADDING frame for too short packets
2025-10-16BUG/MAJOR: lb-chash: fix key calculation when using default hash-key id
2025-10-16BUG/MINOR: ssl: Free key_base from global_ssl structure during deinit
2025-10-16BUG/MINOR: ssl: Free global_ssl structure contents during deinit
2025-10-14BUG/MINOR: sink: retry attempt for sft server may never occur
2025-10-10BUG/MEDIUM: apppet: Improve spinning loop detection with the new API
2025-10-10BUG/MINOR: ssl: always clear the remains of the first hello for the second one
2025-10-10BUG/MEDIUM: ssl: take care of second client hello
2025-10-10BUG/MINOr: hlua: Fix receive from HTTP applet by properly accounting data

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