---
id: CVE-2026-4480
title: >-
  Samba: samba: remote code execution in printing subsystem via unescaped job
  description
summary: >-
  A flaw was found in the Samba printing subsystem. Samba passes the
  client-controlled job description string to the command configured with the
  "print command" setting via the "%J"

  substitution character without escaping shell meta charac…
severity: critical
cvss: 9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-78
vendor: Red Hat
product: samba
affected:
  - samba (all versions)
  - samba (all versions)
  - samba (all versions)
  - samba (all versions)
  - samba (all versions)
  - samba (all versions)
  - samba (all versions)
  - samba (all versions)
  - samba (all versions)
  - samba (all versions)
  - samba (all versions)
  - samba (all versions)
  - samba (all versions)
  - samba (all versions)
  - samba (all versions)
  - samba (all versions)
  - samba (all versions)
  - samba
  - samba4
  - openshift/ose-rhel-coreos-8 (all versions)
  - openshift/ose-rhel-coreos-9
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-05-26T00:00:00+00:00'
exploitAvailable: true
published: '2026-05-26'
updated: '2026-11-04'
sourceUpdated: '2026-11-04T22:28:15.336Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-4480'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2026:22644'
    label: 'RHSA-2026:22644'
  - url: 'https://access.redhat.com/errata/RHSA-2026:22963'
    label: 'RHSA-2026:22963'
  - url: 'https://access.redhat.com/errata/RHSA-2026:25049'
    label: 'RHSA-2026:25049'
  - url: 'https://access.redhat.com/errata/RHSA-2026:25979'
    label: 'RHSA-2026:25979'
  - url: 'https://access.redhat.com/errata/RHSA-2026:28053'
    label: 'RHSA-2026:28053'
  - url: 'https://access.redhat.com/errata/RHSA-2026:28054'
    label: 'RHSA-2026:28054'
  - url: 'https://access.redhat.com/errata/RHSA-2026:28055'
    label: 'RHSA-2026:28055'
  - url: 'https://access.redhat.com/errata/RHSA-2026:28056'
    label: 'RHSA-2026:28056'
  - url: 'https://access.redhat.com/errata/RHSA-2026:28057'
    label: 'RHSA-2026:28057'
  - url: 'https://access.redhat.com/errata/RHSA-2026:28058'
    label: 'RHSA-2026:28058'
  - url: 'https://access.redhat.com/errata/RHSA-2026:28132'
    label: 'RHSA-2026:28132'
  - url: 'https://access.redhat.com/security/cve/CVE-2026-4480'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2452232'
    label: RHBZ#2452232
  - url: 'https://bugzilla.samba.org/show_bug.cgi?id=16033'
tags:
  - cve.org
  - exploit-available
epss: 0.1393
epssPercentile: 0.96554
exploits:
  github: 8
  githubRepos:
    - 'https://github.com/TheCyberGeek/CVE-2026-4480-PoC'
    - 'https://github.com/0xBlackash/CVE-2026-4480'
    - 'https://github.com/saitoken241/CVE-2026-4480-POC'
  nuclei:
    - javascript/cves/2026/CVE-2026-4480
  checkedAt: '2026-11-05T21:36:37.217Z'
ingestedAt: '2026-11-05T21:36:00.647Z'
---

## Overview

A flaw was found in the Samba printing subsystem. Samba passes the client-controlled job description string to the command configured with the "print command" setting via the "%J"
substitution character without escaping shell meta characters. A remote attacker could exploit this vulnerability by sending a specially crafted print job description that contains unescaped shell characters. This could lead to remote code execution on the affected system.

## Affected

- `samba (all versions)`
- `samba (all versions)`
- `samba (all versions)`
- `samba (all versions)`
- `samba (all versions)`
- `samba (all versions)`
- `samba (all versions)`
- `samba (all versions)`
- `samba (all versions)`
- `samba (all versions)`
- `samba (all versions)`
- `samba (all versions)`
- `samba (all versions)`
- `samba (all versions)`
- `samba (all versions)`
- `samba (all versions)`
- `samba (all versions)`
- `samba`
- `samba4`
- `openshift/ose-rhel-coreos-8 (all versions)`
- `openshift/ose-rhel-coreos-9`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

### Workarounds

Remove ```"%J"``` from the "print command" in ```smb.conf``` entry.