CVE-2026-4480 (GCVE-0-2026-4480)
Vulnerability from cvelistv5
Published
2026-05-26 13:56
Modified
2026-08-24 12:07
Severity ?
CWE
  • CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Summary
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.
References
https://access.redhat.com/errata/RHSA-2026:22644 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:22963 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:25049 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:25979 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:28053 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:28054 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:28055 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:28056 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:28057 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:28058 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:28132 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-4480 vdb-entry, x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2452232 issue-tracking, x_refsource_REDHAT
https://bugzilla.samba.org/show_bug.cgi?id=16033
Impacted products
Vendor Product Version
Red Hat Red Hat Enterprise Linux 10 Unaffected: 0:4.23.5-109.el10_2   < *
    cpe:/o:redhat:enterprise_linux:10.2
Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support Unaffected: 0:4.21.3-114.el10_0.1   < *
    cpe:/o:redhat:enterprise_linux_eus:10.0
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   Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support Unaffected: 0:4.10.16-26.el7_9.1   < *
    cpe:/o:redhat:enterprise_linux:7::server
    cpe:/o:redhat:rhel_els:7
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   Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support Unaffected: 0:4.10.16-26.el7_9.1   < *
    cpe:/o:redhat:enterprise_linux:7::server
    cpe:/o:redhat:rhel_els:7
Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:4.19.4-16.el8_10   < *
    cpe:/a:redhat:enterprise_linux:8::appstream
    cpe:/a:redhat:enterprise_linux:8::crb
    cpe:/o:redhat:enterprise_linux:8::baseos
Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:4.19.4-16.el8_10   < *
    cpe:/a:redhat:enterprise_linux:8::appstream
    cpe:/a:redhat:enterprise_linux:8::crb
    cpe:/o:redhat:enterprise_linux:8::baseos
Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Unaffected: 0:4.13.3-12.el8_4.1   < *
    cpe:/o:redhat:rhel_aus:8.4::baseos
    cpe:/o:redhat:rhel_eus_long_life:8.4::baseos
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   Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Unaffected: 0:4.13.3-12.el8_4.1   < *
    cpe:/o:redhat:rhel_aus:8.4::baseos
    cpe:/o:redhat:rhel_eus_long_life:8.4::baseos
Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Unaffected: 0:4.15.5-16.el8_6.1   < *
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
    cpe:/o:redhat:rhel_aus:8.6::baseos
    cpe:/o:redhat:rhel_eus_long_life:8.6::baseos
Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Unaffected: 0:4.15.5-16.el8_6.1   < *
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
    cpe:/o:redhat:rhel_aus:8.6::baseos
    cpe:/o:redhat:rhel_eus_long_life:8.6::baseos
Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service Unaffected: 0:4.17.5-7.el8_8.1   < *
    cpe:/a:redhat:rhel_e4s:8.8::appstream
    cpe:/a:redhat:rhel_tus:8.8::appstream
    cpe:/o:redhat:rhel_e4s:8.8::baseos
    cpe:/o:redhat:rhel_tus:8.8::baseos
Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Unaffected: 0:4.17.5-7.el8_8.1   < *
    cpe:/a:redhat:rhel_e4s:8.8::appstream
    cpe:/a:redhat:rhel_tus:8.8::appstream
    cpe:/o:redhat:rhel_e4s:8.8::baseos
    cpe:/o:redhat:rhel_tus:8.8::baseos
Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:4.23.5-10.el9_8   < *
    cpe:/a:redhat:enterprise_linux:9::appstream
    cpe:/a:redhat:enterprise_linux:9::crb
    cpe:/a:redhat:enterprise_linux:9::resilientstorage
    cpe:/o:redhat:enterprise_linux:9::baseos
Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:4.23.5-10.el9_8   < *
    cpe:/a:redhat:enterprise_linux:9::appstream
    cpe:/a:redhat:enterprise_linux:9::crb
    cpe:/a:redhat:enterprise_linux:9::resilientstorage
    cpe:/o:redhat:enterprise_linux:9::baseos
Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Unaffected: 0:4.17.5-105.el9_2.5   < *
    cpe:/a:redhat:rhel_e4s:9.2::appstream
    cpe:/a:redhat:rhel_e4s:9.2::resilientstorage
    cpe:/o:redhat:rhel_e4s:9.2::baseos
Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Unaffected: 0:4.19.4-105.el9_4.4   < *
    cpe:/a:redhat:rhel_e4s:9.4::appstream
    cpe:/a:redhat:rhel_e4s:9.4::resilientstorage
    cpe:/o:redhat:rhel_e4s:9.4::baseos
Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support Unaffected: 0:4.21.3-14.el9_6.1   < *
    cpe:/a:redhat:rhel_eus:9.6::appstream
    cpe:/a:redhat:rhel_eus:9.6::crb
    cpe:/a:redhat:rhel_eus:9.6::resilientstorage
    cpe:/o:redhat:rhel_eus:9.6::baseos
Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
Create a notification for this product.
   Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
Create a notification for this product.
   Red Hat Red Hat OpenShift Container Platform 4     cpe:/a:redhat:openshift:4
Create a notification for this product.
Show details on NVD website


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\"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:6\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 6\", \"packageName\": \"samba4\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:/a:redhat:openshift:4\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift Container Platform 4\", \"packageName\": \"openshift/ose-rhel-coreos-9\", \"collectionURL\": \"https://access.redhat.com/downloads/content/package-browser/\", \"defaultStatus\": \"unaffected\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-03-27T13:35:42.879Z\", \"value\": \"Reported to Red Hat.\"}, {\"lang\": \"en\", \"time\": \"2026-05-26T13:43:46.237Z\", \"value\": \"Made public.\"}], \"datePublic\": \"2026-05-26T13:43:46.237Z\", \"references\": [{\"url\": \"https://access.redhat.com/errata/RHSA-2026:22644\", \"name\": \"RHSA-2026:22644\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:22963\", \"name\": \"RHSA-2026:22963\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:25049\", \"name\": \"RHSA-2026:25049\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:25979\", \"name\": \"RHSA-2026:25979\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:28053\", \"name\": \"RHSA-2026:28053\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:28054\", \"name\": \"RHSA-2026:28054\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:28055\", \"name\": \"RHSA-2026:28055\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:28056\", \"name\": \"RHSA-2026:28056\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:28057\", \"name\": \"RHSA-2026:28057\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:28058\", \"name\": \"RHSA-2026:28058\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:28132\", \"name\": \"RHSA-2026:28132\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/security/cve/CVE-2026-4480\", \"tags\": [\"vdb-entry\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=2452232\", \"name\": \"RHBZ#2452232\", \"tags\": [\"issue-tracking\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://bugzilla.samba.org/show_bug.cgi?id=16033\"}], \"workarounds\": [{\"lang\": \"en\", \"value\": \"Remove ```\\\"%J\\\"``` from the \\\"print command\\\" in ```smb.conf``` entry.\"}], \"x_generator\": {\"engine\": \"cvelib 1.8.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-78\", \"description\": \"Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"shortName\": \"redhat\", \"dateUpdated\": \"2026-08-21T12:21:28.912Z\"}, \"x_redhatCweChain\": \"CWE-78: Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)\"}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-4480\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-24T12:07:09.108Z\", \"dateReserved\": \"2026-03-19T21:17:35.193Z\", \"assignerOrgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"datePublished\": \"2026-05-26T13:56:32.355Z\", \"assignerShortName\": \"redhat\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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