{"cve":"CVE-2026-74871","nvd":{"published":"2026-08-17T11:16:41.427","modified":"2026-09-10T16:56:31.877","status":"Analyzed","description":"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.","cvss_v4":{"vector":"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","score":6.9},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","score":5.5},"cwes":["CWE-916"],"references":["https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-vxf9-vwp6-2w43","https://www.vulncheck.com/advisories/openssl-encrypt-before-kdf-bypass-via-sequential-xor"],"products":["jahlives:openssl_encrypt"],"source":"nvd","synced_at":"2026-10-19T22:49:10.689564601+00:00"},"epss":{"cve":"CVE-2026-74871","score":0.00108,"percentile":0.01173,"date":"2026-10-31"},"kev":null,"osv":[{"id":"PYSEC-2026-3976","url":"https://osv.dev/vulnerability/PYSEC-2026-3976","summary":"","modified":"2026-09-11T11:00:06.684184126Z","packages":[{"ecosystem":"PyPI","name":"openssl-encrypt","purl":"pkg:pypi/openssl-encrypt","ranges":["<1.4.6"],"fixed":["1.4.6"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}