Vulnerability Details CVE-2026-74871
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 0.6%
CVSS Severity
CVSS v3 Score 6.2
References
Products affected by CVE-2026-74871
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cpe:2.3:a:jahlives:openssl_encrypt:0.2.2
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cpe:2.3:a:jahlives:openssl_encrypt:0.2.3
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cpe:2.3:a:jahlives:openssl_encrypt:0.2.4
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cpe:2.3:a:jahlives:openssl_encrypt:0.2.5
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cpe:2.3:a:jahlives:openssl_encrypt:0.2.6
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cpe:2.3:a:jahlives:openssl_encrypt:0.3.0
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cpe:2.3:a:jahlives:openssl_encrypt:0.3.1
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cpe:2.3:a:jahlives:openssl_encrypt:0.3.2
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cpe:2.3:a:jahlives:openssl_encrypt:0.3.3
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cpe:2.3:a:jahlives:openssl_encrypt:0.4.0
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cpe:2.3:a:jahlives:openssl_encrypt:0.4.1
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cpe:2.3:a:jahlives:openssl_encrypt:0.4.2
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cpe:2.3:a:jahlives:openssl_encrypt:0.4.3
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cpe:2.3:a:jahlives:openssl_encrypt:0.4.4
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cpe:2.3:a:jahlives:openssl_encrypt:0.5.0
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cpe:2.3:a:jahlives:openssl_encrypt:0.5.1
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cpe:2.3:a:jahlives:openssl_encrypt:0.5.3
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cpe:2.3:a:jahlives:openssl_encrypt:0.6.0
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cpe:2.3:a:jahlives:openssl_encrypt:0.7.0
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cpe:2.3:a:jahlives:openssl_encrypt:0.7.1
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cpe:2.3:a:jahlives:openssl_encrypt:0.7.2
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cpe:2.3:a:jahlives:openssl_encrypt:0.8.0
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cpe:2.3:a:jahlives:openssl_encrypt:0.8.1
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cpe:2.3:a:jahlives:openssl_encrypt:0.8.2
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cpe:2.3:a:jahlives:openssl_encrypt:0.9.2
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cpe:2.3:a:jahlives:openssl_encrypt:1.0.0
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cpe:2.3:a:jahlives:openssl_encrypt:1.0.1
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cpe:2.3:a:jahlives:openssl_encrypt:1.0.2
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cpe:2.3:a:jahlives:openssl_encrypt:1.0.3
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cpe:2.3:a:jahlives:openssl_encrypt:1.1.0
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cpe:2.3:a:jahlives:openssl_encrypt:1.2.0
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cpe:2.3:a:jahlives:openssl_encrypt:1.2.1
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cpe:2.3:a:jahlives:openssl_encrypt:1.3.0
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cpe:2.3:a:jahlives:openssl_encrypt:1.3.1
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cpe:2.3:a:jahlives:openssl_encrypt:1.3.2
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cpe:2.3:a:jahlives:openssl_encrypt:1.3.3
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cpe:2.3:a:jahlives:openssl_encrypt:1.3.4
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cpe:2.3:a:jahlives:openssl_encrypt:1.3.5
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cpe:2.3:a:jahlives:openssl_encrypt:1.3.6
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cpe:2.3:a:jahlives:openssl_encrypt:1.4.0
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cpe:2.3:a:jahlives:openssl_encrypt:1.4.1
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cpe:2.3:a:jahlives:openssl_encrypt:1.4.2
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cpe:2.3:a:jahlives:openssl_encrypt:1.4.3
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cpe:2.3:a:jahlives:openssl_encrypt:1.4.4
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cpe:2.3:a:jahlives:openssl_encrypt:1.4.5