---
id: CVE-2026-81717
aliases:
  - PYSEC-2026-3801
  - GHSA-8jx3-27qf-3p97
title: >-
  openssl_encrypt (pip package openssl-encrypt) before 1.4.9 contains two
  weaknesses in the portable USB drive feature, whose threat model …
summary: >-
  openssl_encrypt (pip package openssl-encrypt) before 1.4.9 contains two
  weaknesses in the portable USB drive feature, whose threat model treats the
  removable drive as untrusted (attacker with physical write access).
  USBDriveCreator._veri…
severity: none
vendor: openssl-encrypt
product: openssl-encrypt
ecosystem: pip
affected:
  - openssl-encrypt < 1.4.9
patched:
  - openssl-encrypt 1.4.9
published: '2026-08-27'
updated: '2026-09-03'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/PYSEC-2026-3801'
references:
  - url: >-
      https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-8jx3-27qf-3p97
  - url: >-
      https://www.vulncheck.com/advisories/openssl-encrypt-before-1.4.9-integrity-bypass-via-added-files
tags:
  - osv
  - pip
epss: 0.00118
epssPercentile: 0.01522
ingestedAt: '2026-09-03T19:32:12.367Z'
---

## Overview

openssl_encrypt (pip package openssl-encrypt) before 1.4.9 contains two weaknesses in the portable USB drive feature, whose threat model treats the removable drive as untrusted (attacker with physical write access). USBDriveCreator._verify_integrity_file only validates files listed in the manifest, so files added to the drive — including a root-level autorun payload — are not detected and integrity verification still passes. Additionally, a globally constant, source-embedded KDF salt (_LEGACY_FIXED_SALT) is used to derive the drive encryption key for any drive lacking a per-drive salt file, defeating precomputation resistance and enabling an offline rainbow-table attack.

## Affected packages

- `openssl-encrypt < 1.4.9`

## Remediation

Upgrade to a patched release:

- `openssl-encrypt 1.4.9`