CVE-2026-116071: Weak Password Key Derivation Single Fast Hash Encryption

An encryption key is derived from a secret with a single fast, unsalted hash ($HASH) and the digest is fed straight into a symmetric cipher to encrypt data. Ciphertext produced this way can be brute-forced fully offline at GPU speed (no per-ciphertext KDF work and no salt, so precomputed tables and cross-backup key reuse apply), which exposes every password-

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greprules fetch cve-2026-116071-weak-password-key-derivation-single-fast-hash-encryption --engine opengrep

Description

An encryption key is derived from a secret with a single fast, unsalted hash ($HASH) and the digest is fed straight into a symmetric cipher to encrypt data. Ciphertext produced this way can be brute-forced fully offline at GPU speed (no per-ciphertext KDF work and no salt, so precomputed tables and cross-backup key reuse apply), which exposes every password-