curl / Development / Pending Release Notes
Pending RELEASE-NOTES for the upcoming release
This is work in progress and will change before the release goes public on 2025-11-05.
Changes:
- build: drop Heimdal support
- build: drop the winbuild build system
- krb5: drop support for Kerberos FTP
- libssh2: up the minimum requirement to 1.9.0
- multi: add notifications API
- progress: expand to use 6 characters per size
- ssl: support Apple SecTrust configurations
- tool_getparam: add --knownhosts
- vssh: drop support for wolfSSH
- wcurl: import v2025.09.27
- write-out: make %header{} able to output *all* occurrences of a header
Bugfixes:
- ares: fix leak in tracing
- asyn-ares: use the duped hostname pointer for all calls
- asyn-thrdd resolver: clear timeout when done
- asyn-thrdd: drop pthread_cancel
- autotools: add support for libgsasl auto-detection via pkg-config
- autotools: capitalize 'Rustls' in the log output
- autotools: fix duplicate `UNIX` and `BSD` flags in `buildinfo.txt`
- autotools: fix silly mistake in clang detection for `buildinfo.txt`
- autotools: make `--enable-code-coverage` support llvm/clang
- aws-lc: re-enable large read-ahead with v1.61.0 again
- base64: accept zero length argument to base64_encode
- build: address some `-Weverything` warnings, update picky warnings
- build: avoid overriding system `open` and `stat` symbols
- build: avoid overriding system symbols for fopen functions
- build: avoid overriding system symbols for socket functions
- build: show llvm/clang in platform flags and `buildinfo.txt`
- cf-h2-proxy: break loop on edge case
- cf-ip-happy: mention unix domain path, not port number
- cf-socket: always check Curl_cf_socket_peek() return code
- cf-socket: check params and remove accept procondition
- cf-socket: tweak a memcpy() to read better
- cf-socket: use the right byte order for ports in bindlocal
- cfilter: unlink and discard
- checksrc: catch banned functions when preceded by `(`
- checksrc: fix possible endless loop when detecting `BANNEDFUNC`
- checksrc: fix possible endless loops/errors in the banned function logic
- checksrc: fix to handle `)` predecing a banned function
- checksrc: reduce directory-specific exceptions
- cmake/FindGSS: fix `pkg-config` fallback logic for CMake <3.16
- cmake/FindGSS: whitespace/formatting
- cmake: add `CURL_CODE_COVERAGE` option
- cmake: build the "all" examples source list dynamically
- cmake: clang detection tidy-ups
- cmake: drop exclamation in comment looking like a name
- cmake: fix building docs when the base directory contains `.3`
- cmake: minor Heimdal flavour detection fix
- cmake: support building some complicated examples, build them in CI
- cmake: use modern alternatives for `get_filename_component()`
- cmake: use more `COMPILER_OPTIONS`, `LINK_OPTIONS` / `LINK_FLAGS`
- cmdline-docs: extended, clarified, refreshed
- cmdline-opts/_PROGRESS.md: explain the suffixes
- configure: add "-mt" for pthread support on HP-UX
- cookie: avoid saving a cookie file if no transfer was done
- cpool: make bundle->dest an array; fix UB
- curl_easy_getinfo: error code on NULL arg
- curl_mem_undef.h: limit to `CURLDEBUG` for non-memalloc overrides
- curl_osslq: error out properly if BIO_ADDR_rawmake() fails
- Curl_resolv: fix comment. 'entry' argument is not optional
- curl_slist_append.md: clarify that a NULL pointer is not acceptable
- CURLINFO_FTP_ENTRY_PATH.md: this is for SFTP as well
- CURLOPT_COOKIEFILE.md: clarify when the cookies are loaded
- CURLOPT_HEADER/WRITEFUNCTION.md: drop '* size' since size is always 1
- CURLOPT_MAXLIFETIME_CONN: make default 24 hours
- CURLOPT_SSL_VERIFYHOST.md: add see-also to two other VERIFYHOST options
- CURLOPT_TIMECONDITION.md: works for FILE and FTP as well
- digest_sspi: fix two memory leaks in error branches
- dist: do not distribute `CI.md`
- docs/cmdline-opts: drop double quotes from GLOBBING and URL examples
- docs/libcurl: clarify some timeout option behavior
- docs/libcurl: remove ancient version references
- docs/libcurl: use lowercase must
- docs: fix/tidy code fences
- easy_getinfo: check magic, Curl_close safety
- examples/sessioninfo: cast printf string mask length to int
- examples/sessioninfo: do not disable security
- examples/synctime: make the sscanf not overflow the local buffer
- examples/usercertinmem: avoid stripping const
- examples: drop unused `curl/mprintf.h` includes
- examples: fix build issues in 'complicated' examples
- examples: fix two build issues surfaced with WinCE
- examples: fix two issues found by CodeQL
- examples: fix two more cases of `stat()` TOCTOU
- form.md: drop reference to MANUAL
- ftp: add extra buffer length check
- ftp: fix ftp_do_more returning with *completep unset
- ftp: fix port number range loop for PORT commands
- ftp: fix the 213 scanner memchr buffer limit argument
- ftp: improve fragile check for first digit > 3
- ftp: remove misleading comments
- gtls: avoid potential use of uninitialized variable in trace output
- hostip: don't store negative resolves due unrelated errors
- hostip: remove leftover INT_MAX check in Curl_dnscache_prune
- http2: check push header names by length first
- http2: cleanup pushed newhandle on fail
- http2: ingress handling edge cases
- http: handle user-defined connection headers
- http: make Content-Length parser more WHATWG
- httpsrr: free old pointers when storing new
- INSTALL-CMAKE.md: document useful build targets
- INTERNALS: drop Winsock 2.2 from the dependency list
- ip-happy: do not set unnecessary timeout
- ip-happy: prevent event-based stall on retry
- krb5: return appropriate error on send failures
- krb5_gssapi: fix memory leak on error path
- krb5_sspi: the chlg argument is NOT optional
- ldap: do not base64 encode zero length string
- ldap: tidy-up types, fix error code confusion
- lib: drop unused include and duplicate guards
- lib: fix build error and compiler warnings with verbose strings disabled
- lib: remove personal names from comments
- lib: upgrade/multiplex handling
- libcurl-multi.md: added curl_multi_get_offt mention
- libcurl-security.md: mention long-running connections
- libssh/sftp: fix resume corruption by avoiding O_APPEND with rresume
- libssh2/sftp: fix resume corruption by avoiding O_APPEND with rresume
- libssh2/sftp_realpath: change state consistently
- libssh2: bail out on chgrp and chown number parsing errors
- libssh2: clarify that sshp->path is always at least one byte
- libssh2: drop two redundant null-terminations
- libssh2: error check and null-terminate in ssh_state_sftp_readdir_link()
- libssh2: fix return code for EAGAIN
- libssh: acknowledge SSH_AGAIN in the SFTP state machine
- libssh: clarify myssh_block2waitfor
- libssh: drop two unused assignments
- libssh: error on bad chgrp number
- libssh: error on bad chown number and store the value
- libssh: fix range parsing error handling mistake
- libssh: react on errors from ssh_scp_read
- libssh: return out of memory correctly if aprintf fails
- Makefile.example: fix option order
- Makefile.example: simplify and make it configurable
- managen: ignore version mentions < 7.66.0
- managen: render better manpage references/links
- managen: strict protocol check
- managen: verify the options used in example lines
- mbedtls: check result of setting ALPN
- mbedtls: handle WANT_WRITE from mbedtls_ssl_read()
- mdlinkcheck: reject URLs containing quotes
- memdup0: handle edge case
- multi.h: add CURLMINFO_LASTENTRY
- multi_ev: remove unnecessary data check that confuses analysers
- nghttp3: return NGHTTP3_ERR_CALLBACK_FAILURE from recv_header
- ngtcp2: check error code on connect failure
- ngtcp2: close just-opened QUIC stream when submit_request fails
- ngtcp2: compare idle timeout in ms to avoid overflow
- ngtcp2: fix early return
- ngtcp2: fix handling of blocked stream data
- ngtcp2: fix returns when TLS verify failed
- noproxy: fix the IPV6 network mask pattern match
- openldap: avoid indexing the result at -1 for blank responses
- openldap: check ber_sockbuf_add_io() return code
- openldap: check ldap_get_option() return codes
- openssl-quic: check results better
- openssl-quic: handle error in SSL_get_stream_read_error_code
- openssl-quic: ignore unexpected streams opened by server
- openssl: call SSL_get_error() with proper error
- openssl: clear retry flag on x509 error
- openssl: fail the transfer if ossl_certchain() fails
- openssl: fix build for v1.0.2
- openssl: fix peer certificate leak in channel binding
- openssl: make the asn1_object_dump name null terminated
- openssl: set io_need always
- openssl: skip session resumption when verifystatus is set
- OS400: fix a use-after-free/double-free case
- osslq: set idle timeout to 0
- pingpong: remove two old leftover debug infof() calls
- pytest: skip specific tests for no-verbose builds
- quic: fix min TLS version handling
- quic: ignore EMSGSIZE on receive
- quiche: fix possible leaks on teardown
- quiche: fix verbose message when ip quadruple cannot be obtained.
- quiche: handle tls fail correctly
- quiche: when ingress processing fails, return that error code
- runtests: tag tests that require curl verbose strings
- rustls: fix clang-tidy warning
- rustls: fix comment describing cr_recv()
- rustls: pass the correct result to rustls_failf
- rustls: typecast variable for safer trace output
- rustls: use %zu for size_t in failf() format string
- sasl: clear canceled mechanism instead of toggling it
- schannel: assign result before using it
- schannel_verify: fix mem-leak in Curl_verify_host
- schannel_verify: use more human friendly error messages
- setopt: accept *_SSL_VERIFYHOST set to 2L
- setopt: allow CURLOPT_DNS_CACHE_TIMEOUT set to -1
- setopt: make CURLOPT_MAXREDIRS accept -1 (again)
- smb: adjust buffer size checks
- smtp: check EHLO responses case insensitively
- socks: deny server basic-auth if not configured
- socks: handle error in verbose trace gracefully
- socks: handle premature close
- socks: make Curl_blockread_all return CURLcode
- socks: rewwork, cleaning up socks state handling
- socks_gssapi: make the gss_context a local variable
- socks_gssapi: reject too long tokens
- socks_gssapi: remove superfluous releases of the gss_recv_token
- socks_gssapi: remove the forced "no protection"
- socks_sspi: bail out on too long fields
- socks_sspi: fix memory cleanup calls
- socks_sspi: restore non-blocking socket on error paths
- ssl-sessions.md: mark option experimental
- strerror: drop workaround for SalfordC win32 header bug
- sws: fix checking `sscanf()` return value
- tcp-nodelay.md: expand the documentation
- telnet: ignore empty suboptions
- telnet: make bad_option() consider NULL a bad option too
- telnet: make printsub require another byte input
- telnet: print DISPlay LOCation in printsub without mutating buffer
- telnet: refuse IAC codes in content
- telnet: return error if WSAEventSelect fails
- telnet: return error on crazy TTYPE or XDISPLOC lengths
- telnet: send failure logged but not returned
- telnet: use pointer[0] for "unknown" option instead of pointer[i]
- tests/server: drop pointless memory allocation overrides
- tests/server: drop unsafe `open()` override in signal handler (Windows)
- tftp: check and act on tftp_set_timeouts() returning error
- tftp: default timeout per block is now 15 seconds
- tftp: handle tftp_multi_statemach() return code
- tftp: pin the first used address
- tftp: propagate expired timer from tftp_state_timeout()
- tftp: return error if it hits an illegal state
- tftp: return error when sendto() fails
- tidy-up: `fcntl.h` includes
- tidy-up: assortment of small fixes
- tidy-up: avoid using the reserved macro namespace
- tidy-up: update MS links, allow long URLs via `checksrc`
- tidy-up: URLs
- time-cond.md: refer to the singular curl_getdate man page
- TODO: fix a typo
- TODO: remove already implemented or bad items
- tool: fix exponential retry delay
- tool_cb_hdr: fix fwrite check in header callback
- tool_cb_hdr: size is always 1
- tool_doswin: fix to use curl socket functions
- tool_filetime: replace cast with the fitting printf mask (Windows)
- tool_getparam/set_rate: skip the multiplication on overflow
- tool_getparam: always disable "lib-ids" for tracing
- tool_getparam: warn if provided header looks malformed
- tool_operate: improve wording in retry message
- tool_operate: keep failed partial download for retry auto-resume
- tool_operate: keep the progress meter for --out-null
- tool_progress: handle possible integer overflows
- tool_progress: make max5data() use an algorithm
- transfer: avoid busy loop with tiny speed limit
- unit1323: sync time types and printf masks, drop casts
- unit1664: drop casts, expand masks to full values
- url: make Curl_init_userdefined return void
- urldata: FILE is not a list-only protocol
- vauth/digest: improve the digest parser
- vquic: fix idle-timeout checks (ms<-->ns), 64-bit log & honor 0=no-timeout
- vquic: handling of io improvements
- vquic: sending non-gso packets fix for EAGAIN
- vtls: alpn setting, check proto parameter
- vtls_int.h: clarify data_pending
- vtls_scache: fix race condition
- windows: replace `_beginthreadex()` with `CreateThread()`
- windows: stop passing unused, optional argument for Win9x compatibility
- windows: use consistent format when showing error codes
- windows: use native error code types more
- wolfssl: check BIO read parameters
- wolfssl: fix error check in shutdown
- wolfssl: no double get_error() detail
- ws: clarify an error message
- ws: reject curl_ws_recv called with NULL buffer with a buflen
Contributors:
Adam Light, Alice Lee Poetics, Andrei Kurushin, Andrew Kirillov, Andrew Olsen, BobodevMm on github, Christian Schmitz, Dan Fandrich, Daniel Stenberg, Daniel Terhorst-North, dependabot[bot], divinity76 on github, Emilio Pozuelo Monfort, Ethan Everett, Evgeny Grin (Karlson2k), fds242 on github, Howard Chu, Ignat Loskutov, Javier Blazquez, Jicea, jmaggard10 on github, Johannes Schindelin, Joseph Birr-Pixton, Joshua Rogers, kapsiR on github, kuchara on github, Marcel Raad, Michael Osipov, Michał Petryka, Mohamed Daahir, Nir Azkiel, Patrick Monnerat, Pocs Norbert, Ray Satiro, renovate[bot], rinsuki on github, Samuel Dionne-Riel, Samuel Henrique, Stanislav Fort, Stefan Eissing, tkzv on github, Viktor Szakats