{"id":"CVE-2022-42916","aliases":["ALPINE-CVE-2022-42916","AZL-11369","AZL-38722","BELL-CVE-2022-42916","CURL-CVE-2022-42916","DEBIAN-CVE-2022-42916","EUVD-2022-45973","GHSA-6295-5j29-3cc8","JLSEC-2026-399","OESA-2022-2041","RHSA-2022:8840","ROOT-OS-DEBIAN-11-CVE-2022-42916","SUSE-SU-2022:3785-1","UBUNTU-CVE-2022-42916","USN-5702-1","openSUSE-SU-2024:12447-1"],"status":"published","title":"In curl before 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using...","description":"In curl before 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using its HSTS support, curl can be instructed to use HTTPS directly (instead of using an insecure cleartext HTTP step) even when HTTP is provided in the URL. This mechanism could be bypassed if the host name in the given URL uses IDN characters that get replaced with ASCII counterparts as part of the IDN conversion, e.g., using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop of U+002E (.). 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curl before 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using its HSTS support, curl can be instructed to use HTTPS directly (instead of using an insecure cleartext HTTP step) even when HTTP is provided in the URL. This mechanism could be bypassed if the host name in the given URL uses IDN characters that get replaced with ASCII counterparts as part of the IDN conversion, e.g., using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop of U+002E (.). The earliest affected version is 7.77.0 2021-05-26.","status":"published","published":"2022-10-29T00:00:00Z","modified":"2026-10-14T18:26:44.484Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"adp"}],"cwes":["CWE-319"],"updated_at":"2026-11-02T14:34:27.327929Z"}],"euvd":[{"id":"EUVD-2022-45973","description":"In curl before 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using its HSTS support, curl can be instructed to use HTTPS directly (instead of using an insecure cleartext HTTP step) even when HTTP is provided in the URL. This mechanism could be bypassed if the host name in the given URL uses IDN characters that get replaced with ASCII counterparts as part of the IDN conversion, e.g., using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop of U+002E (.). The earliest affected version is 7.77.0 2021-05-26.","status":"published","published":"2022-10-29T00:00:00Z","modified":"2026-10-14T18:26:44Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T17:27:13.272666Z"}],"ghsa":[{"id":"GHSA-6295-5j29-3cc8","title":"In curl before 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using...","description":"In curl before 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using its HSTS support, curl can be instructed to use HTTPS directly (instead of using an insecure cleartext HTTP step) even when HTTP is provided in the URL. This mechanism could be bypassed if the host name in the given URL uses IDN characters that get replaced with ASCII counterparts as part of the IDN conversion, e.g., using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop of U+002E (.). The earliest affected version is 7.77.0 2021-05-26.","status":"published","published":"2022-10-29T12:00:31Z","modified":"2026-10-14T21:31:37Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-319"],"updated_at":"2026-11-02T15:13:28.606179Z"}],"nvd":[{"id":"CVE-2022-42916","description":"In curl before 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using its HSTS support, curl can be instructed to use HTTPS directly (instead of using an insecure cleartext HTTP step) even when HTTP is provided in the URL. This mechanism could be bypassed if the host name in the given URL uses IDN characters that get replaced with ASCII counterparts as part of the IDN conversion, e.g., using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop of U+002E (.). The earliest affected version is 7.77.0 2021-05-26.","status":"published","published":"2022-10-29T02:15:09.047Z","modified":"2026-10-14T19:16:52.987Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-319"],"updated_at":"2026-11-02T14:07:31.127985Z"}],"osv":[{"id":"ALPINE-CVE-2022-42916","description":"In curl before 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using its HSTS support, curl can be instructed to use HTTPS directly (instead of using an insecure cleartext HTTP step) even when HTTP is provided in the URL. This mechanism could be bypassed if the host name in the given URL uses IDN characters that get replaced with ASCII counterparts as part of the IDN conversion, e.g., using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop of U+002E (.). The earliest affected version is 7.77.0 2021-05-26.","status":"published","published":"2022-10-29T02:15:09.047Z","modified":"2026-11-03T07:18:33.756113163Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-03T07:50:38.973973Z"},{"id":"AZL-11369","title":"CVE-2022-42916 affecting package curl for versions less than 7.86.0-1","description":"In curl before 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using its HSTS support, curl can be instructed to use HTTPS directly (instead of using an insecure cleartext HTTP step) even when HTTP is provided in the URL. This mechanism could be bypassed if the host name in the given URL uses IDN characters that get replaced with ASCII counterparts as part of the IDN conversion, e.g., using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop of U+002E (.). The earliest affected version is 7.77.0 2021-05-26.","status":"published","published":"2022-10-29T02:15:09Z","modified":"2026-04-21T04:22:02.760577Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:28:02.666535Z"},{"id":"AZL-38722","title":"CVE-2022-42916 affecting package tensorflow for versions less than 2.16.1-1","description":"In curl before 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using its HSTS support, curl can be instructed to use HTTPS directly (instead of using an insecure cleartext HTTP step) even when HTTP is provided in the URL. This mechanism could be bypassed if the host name in the given URL uses IDN characters that get replaced with ASCII counterparts as part of the IDN conversion, e.g., using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop of U+002E (.). The earliest affected version is 7.77.0 2021-05-26.","status":"published","published":"2022-10-29T02:15:09Z","modified":"2026-04-21T04:52:07.788234Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:28:04.608733Z"},{"id":"BELL-CVE-2022-42916","title":"CVE-2022-42916 does not affect BellSoft software","status":"withdrawn","published":"2023-08-31T12:16:03.448528Z","modified":"2026-01-26T09:48:10.451352Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:28:17.151188Z"},{"id":"CVE-2022-42916","description":"In curl before 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using its HSTS support, curl can be instructed to use HTTPS directly (instead of using an insecure cleartext HTTP step) even when HTTP is provided in the URL. This mechanism could be bypassed if the host name in the given URL uses IDN characters that get replaced with ASCII counterparts as part of the IDN conversion, e.g., using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop of U+002E (.). The earliest affected version is 7.77.0 2021-05-26.","status":"published","published":"2022-10-29T00:00:00Z","modified":"2026-10-28T02:30:21.839936653Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:44:27.186787Z"},{"id":"JLSEC-2026-399","description":"In curl before 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using its HSTS support, curl can be instructed to use HTTPS directly (instead of using an insecure cleartext HTTP step) even when HTTP is provided in the URL. This mechanism could be bypassed if the host name in the given URL uses IDN characters that get replaced with ASCII counterparts as part of the IDN conversion, e.g., using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop of U+002E (.). The earliest affected version is 7.77.0 2021-05-26.","status":"published","published":"2026-05-04T13:12:06.605Z","modified":"2026-07-18T00:01:55.121715181Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:47:18.573531Z"},{"id":"OESA-2022-2041","title":"curl security update","description":"CURL is a computer software project providing a library (libcurl) and command-line tool (curl) for transferring data using various protocols.\r\n\r\nSecurity Fix(es):\r\n\r\ncurl before 7.86.0 has a double free. If curl is told to use an HTTP proxy for a transfer with a non-HTTP(S) URL, it sets up the connection to the remote server by issuing a CONNECT request to the proxy, and then tunnels the rest of the protocol through. An HTTP proxy might refuse this request (HTTP proxies often only allow outgoing connections to specific port numbers, like 443 for HTTPS) and instead return a non-200 status code to the client. Due to flaws in the error/cleanup handling, this could trigger a double free in curl if one of the following schemes were used in the URL for the transfer: dict, gopher, gophers, ldap, ldaps, rtmp, rtmps, or telnet. The earliest affected version is 7.77.0.(CVE-2022-42915)\r\n\r\nA vulnerability was found in curl. The issue occurs when doing HTTP(S) transfers, where curl might erroneously use the read callback (`CURLOPT_READFUNCTION`) to ask for data to send, even when the `CURLOPT_POSTFIELDS` option has been set if it previously used the same handle to issue a `PUT` request which used that callback. This flaw may surprise the application and cause it to misbehave and either send off the wrong data or use memory after free or similar in the subsequent `POST` request.(CVE-2022-32221)\r\n\r\nIn curl before 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using its HSTS support, curl can be instructed to use HTTPS directly (instead of using an insecure cleartext HTTP step) even when HTTP is provided in the URL. This mechanism could be bypassed if the host name in the given URL uses IDN characters that get replaced with ASCII counterparts as part of the IDN conversion, e.g., using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop of U+002E (.). The earliest affected version is 7.77.0 2021-05-26.(CVE-2022-42916)","status":"published","published":"2022-11-04T11:05:21Z","modified":"2026-08-18T01:17:20.28591002Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high"}],"updated_at":"2026-11-02T15:52:39.934788Z"},{"id":"RHSA-2022:8840","title":"Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.51 SP1 security update","status":"published","published":"2024-09-30T02:24:07Z","modified":"2026-10-15T10:03:26Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:53:10.139266Z"},{"id":"ROOT-OS-DEBIAN-11-CVE-2022-42916","title":"CVE-2022-42916 in curl - Patched by Root","description":"Root has patched CVE-2022-42916 in the curl package for Root:Debian:11. Multiple fixed versions available.","status":"published","published":"2026-08-20T12:49:54Z","modified":"2026-08-20T13:30:03.694481135Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:53:28.544053Z"},{"id":"UBUNTU-CVE-2022-42916","description":"In curl before 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using its HSTS support, curl can be instructed to use HTTPS directly (instead of using an insecure cleartext HTTP step) even when HTTP is provided in the URL. This mechanism could be bypassed if the host name in the given URL uses IDN characters that get replaced with ASCII counterparts as part of the IDN conversion, e.g., using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop of U+002E (.). The earliest affected version is 7.77.0 2021-05-26.","status":"published","published":"2022-10-26T07:00:00Z","modified":"2026-04-22T13:30:16.661746Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T16:53:56.473586Z"},{"id":"CURL-CVE-2022-42916","title":"HSTS bypass via IDN","description":"curl's HSTS check could be bypassed to trick it to keep using HTTP.\n\nUsing its HSTS support, curl can be instructed to use HTTPS directly instead\nof using an insecure clear-text HTTP step even when HTTP is provided in the\nURL. This mechanism could be bypassed if the hostname in the given URL uses\nIDN characters that get replaced to ASCII counterparts as part of the IDN\nconversion. Like using the character UTF-8 U+3002 (`IDEOGRAPHIC FULL STOP`)\ninstead of the common ASCII full stop (U+002E) `.`.\n\nLike this: `http://curl。se。`","status":"published","published":"2022-10-26T08:00:00Z","modified":"2026-10-25T01:05:32.13694193Z","updated_at":"2026-11-02T15:43:55.998148Z"},{"id":"DEBIAN-CVE-2022-42916","description":"In curl before 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using its HSTS support, curl can be instructed to use HTTPS directly (instead of using an insecure cleartext HTTP step) even when HTTP is provided in the URL. This mechanism could be bypassed if the host name in the given URL uses IDN characters that get replaced with ASCII counterparts as part of the IDN conversion, e.g., using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop of U+002E (.). The earliest affected version is 7.77.0 2021-05-26.","status":"published","published":"2022-10-29T02:15:09.047Z","modified":"2026-11-03T06:02:58.800902446Z","updated_at":"2026-11-03T06:43:19.563245Z"},{"id":"openSUSE-SU-2024:12447-1","title":"curl-7.86.0-1.1 on GA media","description":"These are all security issues fixed in the curl-7.86.0-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T02:19:19.497867Z","updated_at":"2026-11-02T16:58:35.751245Z"},{"id":"SUSE-SU-2022:3785-1","title":"Security update for curl","description":"This update for curl fixes the following issues:\n\n  - CVE-2022-32221: Fixed POST following PUT confusion (bsc#1204383).\n  - CVE-2022-42916: Fixed HSTS bypass via IDN (bsc#1204386).\n","status":"published","published":"2022-10-26T18:20:29Z","modified":"2026-02-04T02:17:39.03703Z","updated_at":"2026-11-02T15:53:51.440565Z"},{"id":"USN-5702-1","title":"curl vulnerabilities","description":"Robby Simpson discovered that curl incorrectly handled certain POST\noperations after PUT operations. This issue could cause applications using\ncurl to send the wrong data, perform incorrect memory operations, or crash.\n(CVE-2022-32221)\n\nHiroki Kurosawa discovered that curl incorrectly handled parsing .netrc\nfiles. If an attacker were able to provide a specially crafted .netrc file,\nthis issue could cause curl to crash, resulting in a denial of service.\nThis issue only affected Ubuntu 22.10. (CVE-2022-35260)\n\nIt was discovered that curl incorrectly handled certain HTTP proxy return\ncodes. A remote attacker could use this issue to cause curl to crash,\nresulting in a denial of service, or possibly execute arbitrary code. This\nissue only affected Ubuntu 22.04 LTS, and Ubuntu 22.10. (CVE-2022-42915)\n\nHiroki Kurosawa discovered that curl incorrectly handled HSTS support\nwhen certain hostnames included IDN characters. A remote attacker could\npossibly use this issue to cause curl to use unencrypted connections. This\nissue only affected Ubuntu 22.04 LTS, and Ubuntu 22.10. (CVE-2022-42916)\n","status":"published","published":"2022-10-26T17:28:24Z","modified":"2026-04-22T10:28:53.771444Z","updated_at":"2026-11-02T16:58:16.20937Z"}]}}