---
id: CVE-2026-74886
aliases:
  - PYSEC-2026-3763
  - GHSA-9pgj-v69p-q586
title: >-
  openssl_encrypt versions before 1.4.0 contain a plugin sandbox bypass
  vulnerability where the PluginImportGuard blocks a different set of…
summary: >-
  openssl_encrypt versions before 1.4.0 contain a plugin sandbox bypass
  vulnerability where the PluginImportGuard blocks a different set of modules
  than the AST analyzer's DANGEROUS_MODULES set. Attackers can bypass AST
  analysis through st…
severity: none
vendor: openssl-encrypt
product: openssl-encrypt
ecosystem: pip
affected:
  - openssl-encrypt < 1.4.0
patched:
  - openssl-encrypt 1.4.0
published: '2026-08-17'
updated: '2026-09-02'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/PYSEC-2026-3763'
references:
  - url: >-
      https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-9pgj-v69p-q586
  - url: >-
      https://www.vulncheck.com/advisories/openssl-encrypt-before-plugin-import-guard-bypass
tags:
  - osv
  - pip
epss: 0.00684
epssPercentile: 0.50533
ingestedAt: '2026-09-02T19:31:25.537Z'
---

## Overview

openssl_encrypt versions before 1.4.0 contain a plugin sandbox bypass vulnerability where the PluginImportGuard blocks a different set of modules than the AST analyzer's DANGEROUS_MODULES set. Attackers can bypass AST analysis through string obfuscation or encoding to import unblocked dangerous modules like sys, shutil, multiprocessing, importlib, and pickle for arbitrary code execution.

## Affected packages

- `openssl-encrypt < 1.4.0`

## Remediation

Upgrade to a patched release:

- `openssl-encrypt 1.4.0`