{"id":"CVE-2021-22946","revision":"9c7f9ef27148489f8d66ce66fb6f4f05","records":[{"revision":"9c7f9ef27148489f8d66ce66fb6f4f05","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2021-22946","aliases":[],"title":"A user can tell curl >= 7.20.0 and <= 7.78.0 to require a successful upgrade to TLS when speaking to an IMAP, POP3 or FTP server (`--ssl-reqd` on the command line or`CURLOPT_USE_SSL` set to `CURLUSESSL_CONTROL` or `CURLUSESSL_ALL` withlibcu…","description":"A user can tell curl >= 7.20.0 and <= 7.78.0 to require a successful upgrade to TLS when speaking to an IMAP, POP3 or FTP server (`--ssl-reqd` on the command line or`CURLOPT_USE_SSL` set to `CURLUSESSL_CONTROL` or `CURLUSESSL_ALL` withlibcurl). This requirement could be bypassed if the server would return a properly crafted but perfectly legitimate response.This flaw would then make curl silently continue its operations **withoutTLS** contrary to the instructions and expectations, exposing possibly sensitive data in clear text over the network.","state":0,"publishedAt":"2021-09-29T00:00:00+00:00","modifiedAt":"2026-10-14T11:29:20.323+00:00","affected":[{"ecosystem":"Vendor product","name":"https://github.com/curl/curl","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"n/a\",\n                    \"product\": \"https://github.com/curl/curl\",\n                    \"versions\": [\n                        {\n                            \"version\": \"curl 7.20.0 to and including 7.78.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://hackerone.com/reports/1334111","https://lists.debian.org/debian-lts-announce/2021/09/msg00022.html","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/","https://www.oracle.com/security-alerts/cpuoct2021.html","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/","https://www.oracle.com/security-alerts/cpujan2022.html","https://security.netapp.com/advisory/ntap-20211029-0003/","https://security.netapp.com/advisory/ntap-20220121-0008/","http://seclists.org/fulldisclosure/2022/Mar/29","https://www.oracle.com/security-alerts/cpuapr2022.html","https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf","https://support.apple.com/kb/HT213183","https://www.oracle.com/security-alerts/cpujul2022.html","https://www.debian.org/security/2022/dsa-5197","https://lists.debian.org/debian-lts-announce/2022/08/msg00017.html","https://security.gentoo.org/glsa/202212-01"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2021-22946","license":"CVE Program Terms of Use","key":"cve-program:CVE-2021-22946","identifiers":["CVE-2021-22946"]},"retained":false,"historicalAffected":[]}],"coverage":[]}