---
id: CVE-2020-35459
aliases:
  - GHSA-99xx-83jm-h24m
  - PYSEC-2026-799
title: ClusterLabs crmsh vulnerable to shell code injection
summary: ClusterLabs crmsh vulnerable to shell code injection
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
vendor: crmsh
product: crmsh
ecosystem: pip
affected:
  - crmsh <= 4.2.1
published: '2022-05-24'
updated: '2026-07-07'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-99xx-83jm-h24m'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2020-35459'
  - url: 'https://bugzilla.suse.com/show_bug.cgi?id=1179999'
  - url: 'https://github.com/ClusterLabs/crmsh'
  - url: >-
      https://github.com/ClusterLabs/crmsh/blob/a403aa15f3ea575adfe5e43bf2a31c9f9094fcda/crmsh/history.py#L476
  - url: 'https://github.com/ClusterLabs/crmsh/releases'
  - url: 'https://lists.debian.org/debian-lts-announce/2021/01/msg00021.html'
  - url: 'https://www.openwall.com/lists/oss-security/2021/01/12/3'
  - url: 'http://www.openwall.com/lists/oss-security/2021/01/12/3'
tags:
  - osv
  - pip
epss: 0.00681
epssPercentile: 0.51038
ingestedAt: '2026-07-08T18:25:47.813Z'
---

## Overview

An issue was discovered in ClusterLabs crmsh through 4.2.1. Local attackers able to call `crm history` (when `crm` is run) were able to execute commands via shell code injection to the crm history commandline, potentially allowing escalation of privileges.

## Affected packages

- `crmsh <= 4.2.1`

## Remediation

Refer to the advisory for the patched release.