{"id":"CVE-2021-22897","revision":"68e5e5ad28be4cf6986aa88c05f1cf09","records":[{"revision":"68e5e5ad28be4cf6986aa88c05f1cf09","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2021-22897","aliases":[],"title":"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…","description":"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.","state":0,"publishedAt":"2021-06-11T15:49:38+00:00","modifiedAt":"2026-10-14T10:21:15.069+00:00","affected":[{"ecosystem":"Vendor product","name":"https://github.com/curl/curl","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"https://github.com/curl/curl\",\n                    \"vendor\": \"n/a\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"7.61.0 through 7.76.1\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://hackerone.com/reports/1172857","https://curl.se/docs/CVE-2021-22897.html","https://github.com/curl/curl/commit/bbb71507b7bab52002f9b1e0880bed6a32834511","https://www.oracle.com//security-alerts/cpujul2021.html","https://www.oracle.com/security-alerts/cpujan2022.html","https://security.netapp.com/advisory/ntap-20210727-0007/","https://www.oracle.com/security-alerts/cpuapr2022.html","https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2021-22897","license":"CVE Program Terms of Use","key":"cve-program:CVE-2021-22897","identifiers":["CVE-2021-22897"]},"retained":false,"historicalAffected":[]}],"coverage":[]}