CVE-2026-74889

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.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-j9mh-57cc-665x	Mitigation Vendor Advisory
https://www.vulncheck.com/advisories/openssl-encrypt-before-weak-key-derivation-via-hkdf	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:jahlives:openssl_encrypt:*:*:*:*:*:python:*:*

History

No history.

Information

Published : 2026-08-17 11:16

Updated : 2026-09-01 15:26

NVD link : CVE-2026-74889

Mitre link : CVE-2026-74889

CVE.ORG link : CVE-2026-74889

JSON object : View

Products Affected

jahlives

openssl_encrypt

CWE

CWE-326

Inadequate Encryption Strength

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