UNKNOWNPyPI →
openssl_encrypt versions before 1.4.0 use a non-standard PBKDF2 key derivation construction with iterations=1 per call i
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.
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-743f-89fg-x288
- https://www.vulncheck.com/advisories/openssl-encrypt-before-non-standard-pbkdf2-key-derivation
Structured record: https://osv.dev/vulnerability/PYSEC-2026-3764
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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