{"id":"CVE-2015-7764","aliases":["GHSA-chg9-3c3p-ch23","PYSEC-2017-50"],"title":"Lemur uses static IV per key","summary":"Lemur uses static IV per key","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","vendor":"lemur","product":"lemur","ecosystem":"pip","affected":["lemur < 0.1.5"],"patched":["lemur 0.1.5"],"published":"2022-05-13","updated":"2026-09-10","sourceUpdated":"2026-09-10T03:49:22.227010371Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-chg9-3c3p-ch23","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2015-7764"},{"url":"https://github.com/Netflix/lemur/issues/117"},{"url":"https://github.com/kvesteri/sqlalchemy-utils/issues/166"},{"url":"https://github.com/Netflix/lemur/commit/394e18f76e5eb534d95160945ebc231ec3b4c794"},{"url":"https://github.com/Netflix/lemur"},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/lemur/PYSEC-2017-50.yaml"},{"url":"http://www.openwall.com/lists/oss-security/2015/10/20/3"}],"tags":["osv","pip"],"epss":0.01511,"epssPercentile":0.72916,"ingestedAt":"2026-09-12T03:13:01.688Z","slug":"CVE-2015-7764","body":"## Overview\n\nLemur 0.1.4 does not use sufficient entropy in its IV when encrypting AES in CBC mode.\n\n## Affected packages\n\n- `lemur < 0.1.5`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `lemur 0.1.5`","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":41.3,"likelihood":0.3,"exploitation":0,"ransomware":0},"changes":[]}