{"id":"JLSEC-2026-1339","details":"A user can tell curl \u003e= 7.20.0 and \u003c= 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.","modified":"2026-08-17T13:30:03.676810149Z","published":"2026-08-17T13:15:13.400Z","upstream":["CVE-2021-22946"],"database_specific":{"license":"CC-BY-4.0","sources":[{"imported":"2026-08-16T08:05:12.559Z","modified":"2026-06-17T03:38:05.010Z","published":"2021-09-29T20:15:08.187Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2021-22946","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2021-22946","database_specific":{"status":"Modified"},"id":"CVE-2021-22946"}]},"references":[{"type":"WEB","url":"http://seclists.org/fulldisclosure/2022/Mar/29"},{"type":"WEB","url":"http://seclists.org/fulldisclosure/2022/Mar/29"},{"type":"WEB","url":"https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"},{"type":"WEB","url":"https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"},{"type":"WEB","url":"https://hackerone.com/reports/1334111"},{"type":"WEB","url":"https://hackerone.com/reports/1334111"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2021/09/msg00022.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2021/09/msg00022.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2022/08/msg00017.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2022/08/msg00017.html"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/"},{"type":"WEB","url":"https://security.gentoo.org/glsa/202212-01"},{"type":"WEB","url":"https://security.gentoo.org/glsa/202212-01"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20211029-0003/"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20211029-0003/"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20220121-0008/"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20220121-0008/"},{"type":"WEB","url":"https://support.apple.com/kb/HT213183"},{"type":"WEB","url":"https://support.apple.com/kb/HT213183"},{"type":"WEB","url":"https://www.debian.org/security/2022/dsa-5197"},{"type":"WEB","url":"https://www.debian.org/security/2022/dsa-5197"},{"type":"WEB","url":"https://www.oracle.com/security-alerts/cpuapr2022.html"},{"type":"WEB","url":"https://www.oracle.com/security-alerts/cpuapr2022.html"},{"type":"WEB","url":"https://www.oracle.com/security-alerts/cpujan2022.html"},{"type":"WEB","url":"https://www.oracle.com/security-alerts/cpujan2022.html"},{"type":"WEB","url":"https://www.oracle.com/security-alerts/cpujul2022.html"},{"type":"WEB","url":"https://www.oracle.com/security-alerts/cpujul2022.html"},{"type":"WEB","url":"https://www.oracle.com/security-alerts/cpuoct2021.html"},{"type":"WEB","url":"https://www.oracle.com/security-alerts/cpuoct2021.html"}],"affected":[{"package":{"name":"LibCURL_jll","ecosystem":"Julia","purl":"pkg:julia/LibCURL_jll?uuid=deac9b47-8bc7-5906-a0fe-35ac56dc84c0"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"7.81.0+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1339.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V2","score":"AV:N/AC:L/Au:N/C:P/I:N/A:N","source":"NVD"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","source":"NVD"}]}