curl and libcurl 8.18.0 Public curl releases: 272 Command line options: 273 curl_easy_setopt() options: 308 Public functions in libcurl: 100 Contributors: 3537 This release includes the following changes: This release includes the following bugfixes: o _PROGRESS.md: add the E unit, mention kibibyte [24] o asyn-thrdd: release rrname if ares_init_options fails [41] o autotools: drop autoconf <2.59 compatibility code (zz60-xc-ovr) [70] o ccsidcurl: make curl_mime_data_ccsid() use the converted size [74] o cf-https-connect: allocate ctx at first in cf_hc_create() [79] o checksrc.pl: detect assign followed by more than one space [26] o cmake: adjust defaults for target platforms not supporting shared libs [35] o cmake: disable `CURL_CA_PATH` auto-detection if `USE_APPLE_SECTRUST=ON` [16] o conncache: silence `-Wnull-dereference` on gcc 14 RISC-V 64 [17] o cshutdn: acknowledge FD_SETSIZE for shutdown descriptors [25] o curl: fix progress meter in parallel mode [15] o CURLINFO: remove 'get' and 'get the' from each short desc [50] o CURLINFO_SCHEME/PROTOCOL: they return the "scheme" for a "transfer" [48] o CURLINFO_TLS_SSL_PTR.md: remove CURLINFO_TLS_SESSION text [49] o CURLOPT_READFUNCTION.md: clarify the size of the buffer [47] o CURLOPT_SSH_KEYFUNCTION.md: fix minor indent mistake in example o digest_sspi: properly free sspi identity [12] o docs: fix checksrc `EQUALSPACE` warnings [21] o docs: mention umask need when curl creates files [56] o examples/crawler: fix variable [92] o ftp: refactor a piece of code by merging the repeated part [40] o ftp: remove #ifdef for define that is always defined [76] o gnutls: report accurate error when TLS-SRP is not built-in [18] o gtls: add return checks and optimize the code [2] o gtls: skip session resumption when verifystatus is set o hostip: don't store negative lookup on OOM [61] o http: replace atoi use in Curl_http_follow with curlx_str_number [65] o INSTALL-CMAKE.md: document static option defaults more [37] o krb5_sspi: unify a part of error handling [80] o lib: cleanup for some typos about spaces and code style [3] o lib: fix gssapi.h include on IBMi [55] o lib: refactor the type of funcs which have useless return and checks [1] o libssh2: cleanup ssh_force_knownhost_key_type [64] o libssh2: replace atoi() in ssh_force_knownhost_key_type [63] o m4/sectrust: fix test(1) operator [4] o mbedtls: fix potential use of uninitialized `nread` [8] o mk-ca-bundle.pl: use `open()` with argument list to replace backticks [71] o mqtt: reject overly big messages [39] o noproxy: replace atoi with curlx_str_number [67] o openssl: release ssl_session if sess_reuse_cb fails [43] o openssl: remove code handling default version [28] o OS400/ccsidcurl: fix curl_easy_setopt_ccsid for non-converted blobs [94] o OS400/makefile.sh: fix shellcheck warning SC2038 [86] o osslq: code readability [5] o progress: show fewer digits [78] o pytest: skip H2 tests if feature missing from curl [46] o rtmp: fix double-free on URL parse errors [27] o rtmp: precaution for a potential integer truncation [54] o rustls: fix a potential memory issue [81] o schannel: fix memory leak of cert_store_path on four error paths [23] o scripts: fix shellcheck SC2046 warnings [90] o scripts: use end-of-options marker in `find -exec` commands [87] o setopt: disable CURLOPT_HAPROXY_CLIENT_IP on NULL [30] o setopt: when setting bad protocols, don't store them [9] o sftp: fix range downloads in both SSH backends [82] o socks_sspi: use free() not FreeContextBuffer() [93] o telnet: replace atoi for BINARY handling with curlx_str_number [66] o test2045: replace HTML multi-line comment markup with `#` comments [36] o test363: delete stray character (typo) from a section tag [52] o tests/data: replace hard-coded test numbers with `%TESTNUMBER` [33] o tests/data: support using native newlines on disk, drop `.gitattributes` [91] o tests/server: do not fall back to original data file in `test2fopen()` [32] o tftp: release filename if conn_get_remote_addr fails [42] o tool: consider (some) curl_easy_setopt errors fatal [7] o tool_help: add checks to avoid unsigned wrap around [14] o tool_ipfs: check return codes better [20] o tool_operate: remove redundant condition [19] o tool_operate: use curlx_str_number instead of atoi [68] o tool_paramhlp: refuse --proto remove all protocols [10] o urlapi: fix mem-leaks in curl_url_get error paths [22] o verify-release: update to avoid shellcheck warning SC2034 [88] o vtls: fix CURLOPT_CAPATH use [51] o vtls: handle possible malicious certs_num from peer [53] o wcurl: import v2025.11.09 [29] o wolfSSL: able to differentiate between IP and DNS in alt names [13] o wolfssl: avoid NULL dereference in OOM situation [77] This release includes the following known bugs: See https://curl.se/docs/knownbugs.html For all changes ever done in curl: See https://curl.se/changes.html Planned upcoming removals include: o Builds using VS2008 o OpenSSL 1.x support o OpenSSL-QUIC o Support for c-ares versions before 1.16.0 o Support for Windows XP/2003 o Windows CE support See https://curl.se/dev/deprecate.html This release would not have looked like this without help, code, reports and advice from friends like these: Andrew Kirillov, Brad King, Dan Fandrich, Daniel Stenberg, Fd929c2CE5fA on github, Gisle Vanem, Jiyong Yang, Juliusz Sosinowicz, Leonardo Taccari, Patrick Monnerat, Ray Satiro, renovate[bot], Samuel Henrique, Stanislav Fort, Stefan Eissing, Thomas Klausner, Viktor Szakats, Xiaoke Wang (18 contributors) References to bug reports and discussions on issues: [1] = https://curl.se/bug/?i=19386 [2] = https://curl.se/bug/?i=19366 [3] = https://curl.se/bug/?i=19370 [4] = https://curl.se/bug/?i=19371 [5] = https://curl.se/bug/?i=19394 [7] = https://curl.se/bug/?i=19385 [8] = https://curl.se/bug/?i=19393 [9] = https://curl.se/bug/?i=19389 [10] = https://curl.se/bug/?i=19388 [12] = https://curl.se/bug/?i=19426 [13] = https://curl.se/bug/?i=19364 [14] = https://curl.se/bug/?i=19377 [15] = https://curl.se/bug/?i=19383 [16] = https://curl.se/bug/?i=19380 [17] = https://curl.se/bug/?i=19378 [18] = https://curl.se/bug/?i=19365 [19] = https://curl.se/bug/?i=19381 [20] = https://curl.se/bug/?i=19382 [21] = https://curl.se/bug/?i=19379 [22] = https://curl.se/bug/?i=19440 [23] = https://curl.se/bug/?i=19423 [24] = https://curl.se/bug/?i=19502 [25] = https://curl.se/bug/?i=19439 [26] = https://curl.se/bug/?i=19375 [27] = https://curl.se/bug/?i=19438 [28] = https://curl.se/bug/?i=19354 [29] = https://curl.se/bug/?i=19430 [30] = https://curl.se/bug/?i=19434 [32] = https://curl.se/bug/?i=19429 [33] = https://curl.se/bug/?i=19427 [35] = https://curl.se/bug/?i=19420 [36] = https://curl.se/bug/?i=19498 [37] = https://curl.se/bug/?i=19419 [39] = https://curl.se/bug/?i=19415 [40] = https://curl.se/bug/?i=19411 [41] = https://curl.se/bug/?i=19410 [42] = https://curl.se/bug/?i=19409 [43] = https://curl.se/bug/?i=19405 [46] = https://curl.se/bug/?i=19412 [47] = https://curl.se/bug/?i=19402 [48] = https://curl.se/bug/?i=19403 [49] = https://curl.se/bug/?i=19404 [50] = https://curl.se/bug/?i=19406 [51] = https://curl.se/bug/?i=19401 [52] = https://curl.se/bug/?i=19490 [53] = https://curl.se/bug/?i=19397 [54] = https://curl.se/bug/?i=19399 [55] = https://curl.se/bug/?i=19336 [56] = https://curl.se/bug/?i=19396 [61] = https://curl.se/bug/?i=19484 [63] = https://curl.se/bug/?i=19479 [64] = https://curl.se/bug/?i=19479 [65] = https://curl.se/bug/?i=19478 [66] = https://curl.se/bug/?i=19477 [67] = https://curl.se/bug/?i=19475 [68] = https://curl.se/bug/?i=19480 [70] = https://curl.se/bug/?i=19464 [71] = https://curl.se/bug/?i=19461 [74] = https://curl.se/bug/?i=19465 [76] = https://curl.se/bug/?i=19463 [77] = https://curl.se/bug/?i=19459 [78] = https://curl.se/bug/?i=19431 [79] = https://curl.se/bug/?i=19454 [80] = https://curl.se/bug/?i=19452 [81] = https://curl.se/bug/?i=19425 [82] = https://curl.se/bug/?i=19460 [86] = https://curl.se/bug/?i=19451 [87] = https://curl.se/bug/?i=19450 [88] = https://curl.se/bug/?i=19449 [90] = https://curl.se/bug/?i=19432 [91] = https://curl.se/bug/?i=19398 [92] = https://curl.se/bug/?i=19446 [93] = https://curl.se/bug/?i=19445 [94] = https://curl.se/bug/?i=19444