# CVE-2026-74889

## Summary

- **CVE ID:** CVE-2026-74889
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-326
- **Published:** Aug 17, 2026
- **Last Modified:** Aug 17, 2026

## 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.

## Affected Products

- jahlives — openssl_encrypt (0)
- jahlives — openssl_encrypt (1.4.0)

## References

- [CNA](https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-j9mh-57cc-665x)
- [CNA](https://www.vulncheck.com/advisories/openssl-encrypt-before-weak-key-derivation-via-hkdf)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.20%
- **EPSS Percentile:** 10.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._