CVE-2026-74871
openssl_encrypt before 1.4.6 KDF Bypass via Sequential-XOR
CVSS Score
6.2
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-916 |
| Vendor | jahlives |
| Product | openssl_encrypt |
| Published | Aug 17, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
jahlives / openssl_encrypt
0 < 1.4.6