---
id: RUSTSEC-2026-0273
title: Stubbed cryptography without warnings
summary: Stubbed cryptography without warnings
severity: none
vendor: manzana
product: manzana
ecosystem: rust
affected:
  - 'manzana >= 0.0.0-0, < 0.3.0'
patched:
  - manzana 0.3.0
published: '2026-04-07'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T08:30:02.705790391Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/RUSTSEC-2026-0273'
references:
  - url: 'https://crates.io/crates/manzana'
  - url: 'https://rustsec.org/advisories/RUSTSEC-2026-0273.html'
  - url: 'https://github.com/paiml/manzana/issues/3'
  - url: >-
      https://github.com/paiml/manzana/blob/89e3183ac38088d418a2edeb9d3e0f35133b27a3/README.md
  - url: >-
      https://github.com/paiml/manzana/blob/89e3183ac38088d418a2edeb9d3e0f35133b27a3/src/secure_enclave.rs#L312
  - url: >-
      https://github.com/paiml/manzana/blob/89e3183ac38088d418a2edeb9d3e0f35133b27a3/src/secure_enclave.rs#L352
tags:
  - osv
  - rust
ingestedAt: '2026-09-02T19:31:28.020Z'
---

## Overview

The `manzana` crate appears to be a work-in-progress module for the Apple Silicon chips' features, including the Secure Enclave.

This crate's description and `README`s make no hint at the fact that the [`SecureEnclaveSigner`](https://docs.rs/manzana/0.2.0/manzana/secure_enclave/struct.SecureEnclaveSigner.html) type is a stubbed implementation that does not actually perform any cryptographic operations, and instead returns fixed values.

Unsuspecting users of the crate, who may not check the source code, receive no warning about this and may believe they are using a secure implementation when they are not.

There are currently (as of `2026-04-07`) no versions of the crate that contain either a real implementation, or a warning about the stubbed cryptography.

## Affected packages

- `manzana >= 0.0.0-0, < 0.3.0`

## Remediation

Upgrade to a patched release:

- `manzana 0.3.0`