{"id":"CVE-2026-74871","summary":"openssl_encrypt before 1.4.6 KDF Bypass via Sequential-XOR","details":"openssl_encrypt versions before 1.4.6 contain a key derivation flaw in sequential XOR composition mode where the last stage cancels out during key generation. When configured with a single KDF and no prior hashing stage, attackers can bypass memory-hard key derivation and perform offline password cracking at SHA-256 speed instead of the configured KDF cost.","aliases":["GHSA-vxf9-vwp6-2w43"],"modified":"2026-08-19T03:48:58.790492967Z","published":"2026-08-17T11:04:40.877Z","database_specific":{"cwe_ids":["CWE-916"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74871.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74871.json"},{"type":"ADVISORY","url":"https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-vxf9-vwp6-2w43"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74871"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/openssl-encrypt-before-kdf-bypass-via-sequential-xor"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/jahlives/openssl_encrypt","events":[{"introduced":"0"},{"fixed":"805ee093ec87b8426235df9077ef8d6bd41f15cb"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.4.6"}],"source":["AFFECTED_FIELD","DESCRIPTION"]}}],"versions":["v1.4.5","v1.4.4","v1.4.2","v1.4.1rc2","v1.4.1rc1","v1.4.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74871.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"}]}