CVE-2026-4480: A flaw was found in the Samba printing subsystem. Samba passes the client-controlled job description string to the command configured with the "print ...

Description

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.

Metrics

CVSS 3.1

9/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS Probability

12.80%

95.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-78

Affected Software

Vendor	Product	Versions
Redhat	Openshift Container Platform	4.0
Samba	Samba	>= 4.1.0, < 4.2.1
Redhat	Enterprise Linux	7.0
Redhat	Enterprise Linux	8.0
Redhat	Enterprise Linux	9.0
Redhat	Enterprise Linux	10.0

References

Timeline

Published: May 26, 2026
Last Modified: Jun 23, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2026-4480?

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.

How severe is CVE-2026-4480?

CVE-2026-4480 has a CVSS score of 9/10 (CRITICAL severity). The EPSS model estimates a 12.80% probability of exploitation in the next 30 days.

How do I fix CVE-2026-4480?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.