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.
History

Thu, 01 Oct 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 01 Oct 2026 15:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:jahlives:openssl_encrypt:*:*:*:*:*:*:*:*

Thu, 10 Sep 2026 17:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:jahlives:openssl_encrypt:*:*:*:*:*:python:*:*

Fri, 21 Aug 2026 13:00:00 +0000

Type Values Removed Values Added
First Time appeared Jahlives
Jahlives openssl Encrypt
Vendors & Products Jahlives
Jahlives openssl Encrypt

Mon, 17 Aug 2026 11:15:00 +0000

Type Values Removed Values Added
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.
Title openssl_encrypt before 1.4.6 KDF Bypass via Sequential-XOR
Weaknesses CWE-916
References
Metrics cvssV3_1

{'score': 6.2, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-08-17T11:04:40.877Z

Updated: 2026-10-01T15:20:48.243Z

Reserved: 2026-08-17T10:31:04.593Z

Link: CVE-2026-74871

cve-icon Vulnrichment

Updated: 2026-08-17T17:35:30.098Z

cve-icon NVD

Status : Analyzed

Published: 2026-08-17T11:16:41.427

Modified: 2026-09-10T16:56:31.877

Link: CVE-2026-74871

cve-icon Redhat

No data.