{"id":"JLSEC-2026-1333","details":"curl 7.61.0 through 7.76.1 suffers from exposure of data element to wrong session due to a mistake in the code for `CURLOPT_SSL_CIPHER_LIST` when libcurl is built to use the Schannel TLS library. The selected cipher set was stored in a single \"static\" variable in the library, which has the surprising side-effect that if an application sets up multiple concurrent transfers, the last one that sets the ciphers will accidentally control the set used by all transfers. In a worst-case scenario, this weakens transport security significantly.","modified":"2026-08-17T13:30:03.105379144Z","published":"2026-08-17T13:15:13.400Z","upstream":["CVE-2021-22897"],"database_specific":{"sources":[{"modified":"2026-06-17T03:37:58.520Z","published":"2021-06-11T16:15:10.963Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2021-22897","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2021-22897","database_specific":{"status":"Modified"},"id":"CVE-2021-22897","imported":"2026-08-16T08:05:12.414Z"}],"license":"CC-BY-4.0"},"references":[{"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://curl.se/docs/CVE-2021-22897.html"},{"type":"WEB","url":"https://curl.se/docs/CVE-2021-22897.html"},{"type":"WEB","url":"https://github.com/curl/curl/commit/bbb71507b7bab52002f9b1e0880bed6a32834511"},{"type":"WEB","url":"https://github.com/curl/curl/commit/bbb71507b7bab52002f9b1e0880bed6a32834511"},{"type":"WEB","url":"https://hackerone.com/reports/1172857"},{"type":"WEB","url":"https://hackerone.com/reports/1172857"},{"type":"WEB","url":"https://hackerone.com/reports/1172857"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20210727-0007/"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20210727-0007/"},{"type":"WEB","url":"https://www.oracle.com//security-alerts/cpujul2021.html"},{"type":"WEB","url":"https://www.oracle.com//security-alerts/cpujul2021.html"},{"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"}],"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-2026-1333.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V2","score":"AV:N/AC:M/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:L/I:N/A:N","source":"NVD"}]}