{"id":"CVE-2026-74888","summary":"openssl_encrypt before 1.4.0 Non-Standard PBKDF2 Key Derivation","details":"openssl_encrypt versions before 1.4.0 use a non-standard PBKDF2 key derivation construction with iterations=1 per call in an outer loop, creating a KDF whose security properties have not been formally analyzed. Attackers can exploit this weakened key derivation to more efficiently crack passwords protecting legacy encrypted files compared to standard PBKDF2 implementations.","aliases":["GHSA-743f-89fg-x288","PYSEC-2026-3764"],"modified":"2026-09-03T03:48:19.919476243Z","published":"2026-08-17T11:04:52.472Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-327"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74888.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74888.json"},{"type":"ADVISORY","url":"https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-743f-89fg-x288"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74888"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/openssl-encrypt-before-non-standard-pbkdf2-key-derivation"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/jahlives/openssl_encrypt","events":[{"introduced":"0"},{"fixed":"768df5cd1910e349509f07a27eeac6951e0003bf"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.4.0"}],"source":["AFFECTED_FIELD","CPE_RANGE"],"cpe":"cpe:2.3:a:jahlives:openssl_encrypt:*:*:*:*:*:python:*:*"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74888.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"}]}