CVE-2026-74889 openssl_encrypt before 1.4.0 Weak Key Derivation via HKDF

What is CVE-2026-74889?

CVE-2026-74889 is a critical vulnerability in Jahlives Openssl Encrypt, published on 17 Aug 2026.

Official description

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.

Weakness: CWE-326

Which versions are affected by CVE-2026-74889?

1 open source package ship an affected version, including openssl-encrypt. It affects 1 product.

Products include Jahlives Openssl Encrypt.

How do I fix CVE-2026-74889?

Upgrade openssl-encrypt to 1.4.0 or later.

Is CVE-2026-74889 being exploited?

There is no known exploitation of CVE-2026-74889 in the wild and no public exploit code.

Other vulnerabilities in Jahlives Openssl Encrypt

• CVE-2026-81680 openssl_encrypt before 1.4.9 Authentication Bypass via Recovery Slot Removal Critical 9.3
• CVE-2026-81681 openssl_encrypt before 1.4.9 False Encryption via Cleartext Storage Critical 9.3
• CVE-2026-81685 openssl_encrypt before 1.4.9 Text Injection via Recovery Slot Metadata Critical 9.3
• CVE-2026-81694 openssl-encrypt before 1.4.9 Output Injection via Unsanitized Filenames in verify-usb Command Critical 9.3
• CVE-2026-81695 openssl_encrypt before 1.4.9 Terminal Injection via key_id Critical 9.3

All Jahlives Openssl Encrypt vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• GitHub advisory
• How this page is made

Also known as GHSA-fxcp-mjj5-v58w, GHSA-j9mh-57cc-665x, PYSEC-2026-3765.