HAProxy known bugs for version v3.2.12 (maintenance branch 3.2) :  81 

This version (3.2.12) is a release belonging to maintenance branch 3.2 whose latest version is 3.2.15. 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
2026-03-193.2.15 ⇐ last
2026-03-093.2.14 
2026-02-193.2.13 
2026-02-123.2.12 ⇐ yours
2026-01-293.2.11 
2025-12-183.2.10 
2025-11-213.2.9 
2025-11-073.2.8 
2025-10-233.2.7 
2025-10-033.2.6 
2025-09-233.2.5 
2025-08-133.2.4 
2025-07-093.2.3 
2025-07-023.2.2 
2025-06-113.2.1 
2025-05-283.2.0 

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

These fixes have already been queued for a more recent 3.2 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
81 0 5 16 60

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

Merge dateSubject - Severity (minor, medium, major, critical)
2026-03-31BUG/MINOR: stconn: Always declare the SC created from healthchecks as a back SC
2026-03-31BUG/MINOR: quic: close conn on packet reception with incompatible frame
2026-03-31BUG/MINOR: acme: fix task allocation leaked upon error
2026-03-31BUG/MEDIUM: acme: skip doing challenge if it is already valid
2026-03-31BUG/MINOR: http-ana: Only consider client abort for abortonclose
2026-03-31BUG/MINOR: config: Properly test warnif_misplaced_* return values
2026-03-31BUG/MINOR: acme: permission checks on the CLI
2026-03-23BUG/MINOR: acme/cli: fix argument check and error in 'acme challenge_ready'
2026-03-23BUG/MINOR: acme: replace atol with len-bounded __strl2uic() for retry-after
2026-03-23BUG/MINOR: acme: free() DER buffer on a2base64url error path
2026-03-23BUG/MEDIUM: spoe: Acquire context buffer in applet before consuming a frame
2026-03-23BUG/MINOR: acme: fix incorrect number of arguments allowed in config
2026-03-23BUG/MINOR: acme: wrong labels logic always memprintf errmsg
2026-03-23BUG/MINOR: acme: acme_ctx_destroy() leaks auth->dns
2026-03-23Revert "BUG/MEDIUM: mux-h2: make sure to always report pending errors to the stream"
2026-03-23BUG/MINOR: acme/cli: wrong argument check in 'acme renew'
2026-03-23BUG/MINOR: acme: wrong error when checking for duplicate section
2026-03-23BUG/MINOR: acme: leak of ext_san upon insertion error
2026-03-23BUG/MEDIUM: acme: fix multiple resource leaks in acme_x509_req()
2026-03-23BUG/MINOR: qpack: fix 62-bit overflow and 1-byte OOB reads in decoding
2026-03-23BUG/MINOR: sock: adjust accept() error messages for ENFILE and ENOMEM
2026-03-23BUG/MINOR: mworker: fix sort order of mworker_proc in 'show proc'
2026-03-19BUG/MINOR: mworker/cli: fix show proc pagination losing entries on resume
2026-03-19BUG/MEDIUM: h3: reject unaligned frames except DATA
2026-03-19BUG/MAJOR: h3: check body size with content-length on empty FIN
2026-03-19BUG/MINOR: mux-h2: properly ignore R bit in WINDOW_UPDATE increments
2026-03-19BUG/MINOR: mux-h2: properly ignore R bit in GOAWAY stream ID
2026-03-19BUG/MEDIUM: peers: enforce check on incoming table key type
2026-03-19BUG/MINOR: mworker: don't try to access an initializing process
2026-03-18BUG/MINOR: spoe: Fix condition to abort processing on client abort
2026-03-18BUG/MINOR: mjson: make mystrtod() length-aware to prevent out-of-bounds reads
2026-03-18BUG/MINOR: stream: Fix crash in stream dump if the current rule has no keyword
2026-03-18BUG/MINOR: proxy: do not forget to validate quic-initial rules
2026-03-18BUG/MINOR: http-ana: Swap L7 buffer with request buffer by hand
2026-03-18BUG/MINOR: h2/h3: Never insert partial headers/trailers in an HTX message
2026-03-18BUG/MINOR: h2/h3: Only test number of trailers inserted in HTX message
2026-03-18BUG/MEDIUM: spoe: Properly abort processing on client abort
2026-03-18BUG/MINOR: spoe: Properly switch SPOE filter to WAITING_ACK state
2026-03-18BUG/MINOR: sockpair: set FD_CLOEXEC on fd received via SCM_RIGHTS
2026-03-18BUG/MINOR: mworker: avoid passing NULL version in proc list serialization
2026-03-18BUG/MINOR: mworker: set a timeout on the worker socketpair read at startup
2026-03-18BUG/MINOR: mworker: fix typo &= instead of & in proc list serialization
2026-03-18BUG/MINOR: mworker: only match worker processes when looking for unspawned proc
2026-03-18BUG/MINOR: memprof: avoid a small memory leak in "show profiling"
2026-03-18BUG/MINOR: mworker: always stop the receiving listener
2026-03-18BUG/MINOR: jws: fix memory leak in jws_b64_signature
2026-03-18BUG/MINOR: tcpcheck: Fix typo in error error message for `http-check expect`
2026-03-18BUG/MINOR: mworker: don't set the PROC_O_LEAVING flag on master process
2026-03-09BUG/MINOR: backend: Don't get proto to use for webscoket if there is no server
2026-03-09BUG/MINOR: ssl-sample: Fix sample_conv_sha2() by checking EVP_Digest* failures
2026-03-05BUG/MEDIUM: mux-fcgi: Use a safe loop to resume each stream eligible for sending
2026-03-05BUG/MAJOR: resolvers: Properly lowered the names found in DNS response
2026-03-05BUG/MAJOR: fcgi: Fix param decoding by properly checking its size
2026-03-05DEBUG: stream: Display the currently running rule in stream dump
2026-03-05BUG/MINOR: h1-htx: Be sure that H1 response version starts by "HTTP/"
2026-03-05BUG/MEDIUM: qpack: correctly deal with too large decoded numbers
2026-03-05BUG/MINOR: qpack: fix 1-byte OOB read in qpack_decode_fs_pfx()
2026-03-05BUG/MAJOR: qpack: unchecked length passed to huffman decoder
2026-03-05BUG/MEDIUM: hpack: correctly deal with too large decoded numbers
2026-03-05BUG/MEDIUM: stream: Handle TASK_WOKEN_RES as a stream event
2026-03-05BUG/MINOR: promex: fix server iteration when last server is deleted
2026-02-26BUG/MEDIUM: mux-h2: make sure to always report pending errors to the stream
2026-02-18BUG/MINOR: http-ana: Stop to wait for body on client error/abort
2026-02-18BUG/MINOR: flt-trace: Properly compute length of the first DATA block
2026-02-18BUG/MEDIUM: applet: Fix test on shut flags for legacy applets (v2)
2026-02-18BUG/MEDIUM: mux-h1: Stop sending vi fast-forward for unexpected states
2026-02-18BUG/MEDIUM: mux-h2/quic: Stop sending via fast-forward if stream is closed
2026-02-18BUG/MEDIUM: h3: reject frontend CONNECT as currently not implemented
2026-02-18BUG/MAJOR: Revert "MEDIUM: mux-quic: add BUG_ON if sending on locally closed QCS"
2026-02-18BUG/MINOR: ssl: error with ssl-f-use when no "crt"
2026-02-18BUG/MINOR: ssl: clarify ssl-f-use errors in post-section parsing
2026-02-18BUG/MINOR: ssl: fix leak in ssl-f-use parser upon error
2026-02-18BUG/MINOR: ssl: double-free on error path w/ ssl-f-use parser
2026-02-18BUG/MINOR: ssl: lack crtlist_dup_ssl_conf() declaration
2026-02-18BUG/MINOR: deviceatlas: set cache_size on hot-reloaded atlas instance
2026-02-18BUG/MINOR: deviceatlas: fix deinit to only finalize when initialized
2026-02-18BUG/MINOR: deviceatlas: fix resource leak on hot-reload compile failure
2026-02-18BUG/MINOR: deviceatlas: fix double-checked locking race in checkinst
2026-02-18BUG/MINOR: deviceatlas: fix cookie vlen using wrong length after extraction
2026-02-18BUG/MINOR: deviceatlas: fix off-by-one in da_haproxy_conv()
2026-02-18BUG/MEDIUM: deviceatlas: fix resource leaks on init error paths
2026-02-18BUG/MINOR: deviceatlas: add NULL checks on strdup() results in config parsers
2026-02-18BUG/MINOR: deviceatlas: add missing return on error in config parsers

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