CVE-2026-74871: Jahlives OpenSSL Encrypt

Medium severity, CVSS 5.5. EPSS: 0.1% chance of exploitation in the next 30 days.

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.

Affected products

• Jahlives OpenSSL Encrypt: before 1.4.6 (fixed in 1.4.6)

Published 2026-08-17. Last modified 2026-09-10.