CVE-2026-4480

CRITICAL 9.0

Samba: samba: remote code execution in printing subsystem via unescaped job description

CVSS Score

9.0

EPSS Score

0.4%

EPSS Percentile

60th

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.

CWE	CWE-78
Vendor	red hat
Product	red hat enterprise linux 10
Published	May 26, 2026
Last Updated	Jun 9, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Red Hat / Red Hat Enterprise Linux 10

All versions affected

Red Hat / Red Hat Enterprise Linux 8

All versions affected

Red Hat / Red Hat Enterprise Linux 8

All versions affected

Red Hat / Red Hat Enterprise Linux 6

All versions affected

Red Hat / Red Hat Enterprise Linux 6

All versions affected

Red Hat / Red Hat Enterprise Linux 7

All versions affected

Red Hat / Red Hat Enterprise Linux 9

All versions affected

Red Hat / Red Hat OpenShift Container Platform 4

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗

access.redhat.com: https://access.redhat.com/errata/RHSA-2026:22644 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:22963 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-4480 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2452232 bugzilla.samba.org: https://bugzilla.samba.org/show_bug.cgi?id=16033

Credits

Red Hat would like to thank Arjun Basnet (Securin Labs), John Walker (ZeroPath), and Ron Ben Yizhak (SafeBreach) for reporting this issue.