UNKNOWNPyPI →
openssl_encrypt versions before 1.4.0 use HKDF with no salt and static info parameter in key normalization functions, re
openssl_encrypt versions before 1.4.0 use HKDF with no salt and static info parameter in key normalization functions, reducing entropy extraction and determinism. Attackers can exploit predictable key derivation with identical inputs to weaken cryptographic security against multi-target attacks.
Affected packages
- openssl-encrypt— before 1.4.0
Exploit signal
- Known exploited (CISA KEV)
- No
- EPSS score
- —
- EPSS percentile
- —
EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs.
Sources
- https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-j9mh-57cc-665x
- https://www.vulncheck.com/advisories/openssl-encrypt-before-weak-key-derivation-via-hkdf
Structured record: https://osv.dev/vulnerability/PYSEC-2026-3765
Recommended response stack
Snyk — Scan your dependencies in CI and fix this vulnerability.→Socket — Detect malicious and compromised packages before they ship.→
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