HAProxy known bugs for version v3.3.0 (maintenance branch 3.3) :  24 

This version (3.3.0) is a release belonging to maintenance branch 3.3 whose latest version is 3.3.1. 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
2025-12-193.3.1 ⇐ last
2025-11-263.3.0 ⇐ yours

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

These fixes have already been queued for a more recent 3.3 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
24 0 0 15 9

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

Merge dateSubject - Severity (minor, medium, major, critical)
2025-12-18BUG/MEDIUM: mux-h2: synchronize all conditions to create a new backend stream
2025-12-18BUG/MEDIUM: backend: Do not remove CO_FL_SESS_IDLE in assign_server()
2025-12-16BUG/MEDIUM: quic: Don't try to use hystart if not implemented
2025-12-12BUG/MINOR: quic-be: Missing keywords array NULL termination
2025-12-12BUG/MEDIUM: stconn: Don't report abort from SC if read0 was already received
2025-12-12BUG/MEDIUM: http-ana: Properly detect client abort when forwarding response (v2)
2025-12-12BUG/MEDIUM: h3: fix access to QCS definitely
2025-12-12BUG/MEDIUM: ssl: Don't resume session for check connections
2025-12-12BUG/MEDIUM: ssl: Don't store the ALPN for check connections
2025-12-12BUG/MEDIUM: ssl: Always check the ALPN after handshake
2025-12-12BUG/MEDIUM: ssl: Don't reuse TLS session if the connection's SNI differs
2025-12-12BUG/MINOR: mworker/cli: 'show proc' is limited by buffer size
2025-12-12BUG/MEDIUM: h3: do not access QCS if not allocated
2025-12-12BUG/MEDIUM: http-ana: Don't close server connection on read0 in TUNNEL mode
2025-12-12BUG/MINOR: log: Dump good %B and %U values in logs
2025-12-12BUG/MINOR: ssl: Don't allow to set NULL sni
2025-12-12BUG/MINOR: quic: do not set first the default QUIC curves
2025-12-12BUG/MINOR: quic-be: missing connection stream closure upon TLS alert to send
2025-12-12BUG/MINOR: quic-be: handshake errors without connection stream closure
2025-12-12BUG/MINOR: quic/ssl: crash in ClientHello callback ssl traces
2025-12-12BUG/MEDIUM: config: ignore empty args in skipped blocks
2025-12-12BUG/MEDIUM: connection: fix "bc_settings_streams_limit" typo
2025-12-12BUG/MINOR: jwt: Missing "case" in switch statement
2025-12-11BUG/MEDIUM: mworker/listener: ambiguous use of RX_F_INHERITED with shards

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