CVE-2026-4480

CVE-2026-4480 is a critical-severity vulnerability in Redhat Openshift Container Platform with a CVSS 3.x base score of 9.0. Its EPSS exploit-prediction score of 14% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-78.

Key facts

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.

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 3.x base score of 9.0, rated critical severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-4480 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 14% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-4480?
CVE-2026-4480 primarily affects Redhat Openshift Container Platform. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-4480?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-4480 have an EU (EUVD) identifier?
Yes. CVE-2026-4480 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31828.
When was CVE-2026-4480 published?
CVE-2026-4480 was published on 2026-05-26 and last updated on 2026-08-21.

References

Affected products (6)

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