Vulnerability DatabaseCVE-2026-74889
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CVE-2026-74889
Published:August 17, 2026
Updated:September 01, 2026
openssl_encrypt versions before 1.4.0 use HKDF with no salt and static info parameter in key normalization functions, reducing entropy extraction and determinism. Attackers can exploit predictable key derivation with identical inputs to weaken cryptographic security against multi-target attacks.
Affected Packages
https://github.com/jahlives/openssl_encrypt.git (GITHUB):
Affected version(s) >=v1.0.0 <v1.4.0
Fix Suggestion:
Update to version v1.4.0
openssl-encrypt (PYTHON):
Affected version(s) >=0.2.2 <1.4.0
Fix Suggestion:
Update to version 1.4.0
Related Resources (4)
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74889.json
https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-j9mh-57cc-665x
https://www.vulncheck.com/advisories/openssl-encrypt-before-weak-key-derivation-via-hkdf
https://nvd.nist.gov/vuln/detail/CVE-2026-74889
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CVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Inadequate Encryption Strength
CWE-326
EPSS
Base Score:
0.20