Medium severity6.2NVD Advisory· Published Aug 17, 2026
CVE-2026-74871
CVE-2026-74871
Description
openssl_encrypt versions before 1.4.6 contain a key derivation flaw in sequential XOR composition mode where the last stage cancels out during key generation. When configured with a single KDF and no prior hashing stage, attackers can bypass memory-hard key derivation and perform offline password cracking at SHA-256 speed instead of the configured KDF cost.
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Affected products
1- Range: <1.4.6
Patches
Vulnerability mechanics
References
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