CVE-2026-81689 - openssl_encrypt versions before 1.4.9 derive the remote-pepper wrap key using unsalted HKDF-SHA256 or bare SHA-256 of the password, allowing identical keys across all users and files. Attackers with access to wrapped pepper blobs can precompute a single dictionary table and perform fleet-wide offline password guessing at hardware speed to recover user passwords. - 漏洞详情

漏洞编号：CVE-2026-81689

风险等级：高危

漏洞来源：CVE

CVE 编号：CVE-2026-81689

CNNVD 编号：-

厂商/产品：- / -

影响范围：-

CWE：CWE-916

发布/更新时间：2026-08-27 / 2026-08-28

漏洞描述

openssl_encrypt versions before 1.4.9 derive the remote-pepper wrap key using unsalted HKDF-SHA256 or bare SHA-256 of the password, allowing identical keys across all users and files. Attackers with access to wrapped pepper blobs can precompute a single dictionary table and perform fleet-wide offline password guessing at hardware speed to recover user passwords.

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