CVE-2026-74889

jahlives openssl_encrypt

Published 17 Aug 2026 · updated 1 Sept 2026 · Analyzed

9.3 Critical · CVSS 4.0, vulncheck.com

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.

References

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