{"id":"CVE-2026-81689","aliases":["PYSEC-2026-3959","GHSA-3v63-778v-3mvp"],"title":"openssl_encrypt versions before 1.4.9 derive the remote-pepper wrap key using unsalted HKDF-SHA256 or bare SHA-256 of the password, allow…","summary":"openssl_encrypt versions before 1.4.9 derive the remote-pepper wrap key using unsalted HKDF-SHA256 or bare SHA-256 of the password, allowing identical keys across all users and files. Attackers with access to wrapped pepper blobs can pre…","severity":"none","vendor":"openssl-encrypt","product":"openssl-encrypt","ecosystem":"pip","affected":["openssl-encrypt < 1.4.9"],"patched":["openssl-encrypt 1.4.9"],"published":"2026-08-27","updated":"2026-09-10","sourceUpdated":"2026-09-10T13:00:04.707453404Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/PYSEC-2026-3959","references":[{"url":"https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-3v63-778v-3mvp"},{"url":"https://www.vulncheck.com/advisories/openssl-encrypt-before-1.4.9-weak-pepper-key-derivation"}],"tags":["osv","pip"],"epss":0.00198,"epssPercentile":0.09913,"ingestedAt":"2026-09-12T03:13:01.743Z","slug":"CVE-2026-81689","body":"## Overview\n\nopenssl_encrypt versions before 1.4.9 derive the remote-pepper wrap key using unsalted HKDF-SHA256 or bare SHA-256 of the password, allowing identical keys across all users and files. Attackers with access to wrapped pepper blobs can precompute a single dictionary table and perform fleet-wide offline password guessing at hardware speed to recover user passwords.\n\n## Affected packages\n\n- `openssl-encrypt < 1.4.9`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `openssl-encrypt 1.4.9`","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}