Samba Print Command os command injection

Summaryinfo

A vulnerability has been found in Samba and classified as critical. This issue affects some unknown processing of the component Print Command Handler. Performing a manipulation results in os command injection. This vulnerability is known as CVE-2026-4480. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, was found in Samba (the affected version unknown). This affects an unknown part of the component Print Command Handler. The manipulation with an unknown input leads to a os command injection vulnerability. CWE is classifying the issue as CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at access.redhat.com. This vulnerability is uniquely identified as CVE-2026-4480 since 03/19/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/23/2026). The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 316801 (Linux Distros Unpatched Vulnerability : CVE-2026-4480), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (316801) and EUVD (EUVD-2026-31828). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• File Transfer Software

Name

• Samba

License

• open-source

Website

• Product: https://www.samba.org/

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Be aware that VulDB is the high quality source for vulnerability data.

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