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{"bugzilla": {"description": "samba: Samba: Remote Code Execution in printing subsystem via unescaped job description", "id": "2452232", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2452232"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-78", "details": ["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\"\nsubstitution 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."], "mitigation": {"lang": "en:us", "value": "Remove ```\"%J\"``` from the \"print command\" in ```smb.conf``` entry."}, "name": "CVE-2026-4480", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "samba", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "samba", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "samba4", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "samba", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "samba", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "samba", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-05-26T13:43:46Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-4480\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-4480\nhttps://bugzilla.samba.org/show_bug.cgi?id=16033"], "statement": "The issue affects the Samba printing subsystem. Red Hat has classified this issue as Important severity rather than Critical.\nPrint servers configured with ```\"printing = cups\"``` or ```\"printing = iprint\"```, and print servers that do not have the ```\"%J\"``` substitution character in the \"print command\" setting are not affected.\nBy default, Red Hat Enterprise Linux ships with Samba configured to use CUPS-based printing ```printing = cups```. Hence, although the vulnerable code is present, it is not exploitable in default RHEL configurations. \nIn addition, typical RHEL Samba deployments require authenticated access to submit print jobs, therefore Privileges Required are assessed as Low (PR:L).\nBecause exploitation depends on non-default Samba printing configurations and requires use of the %J substitution parameter within print command, the attack complexity is considered High (AC:H), reducing the likelihood of exploitation in standard deployments.", "threat_severity": "Important"}

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