UBUNTU-CVE-2026-27447

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Source
https://ubuntu.com/security/CVE-2026-27447
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-27447.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-27447
Upstream
Published
2026-04-03T22:16:00Z
Modified
2026-04-13T14:29:15.249207Z
Severity
  • 4.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:L/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, CUPS daemon (cupsd) contains an authorization bypass vulnerability due to case-insensitive username comparison during authorization checks. The vulnerability allows an unprivileged user to gain unauthorized access to restricted operations by using a user with a username that differs only in case from an authorized user. At time of publication, there are no publicly available patches.

References

Affected packages

Ubuntu:22.04:LTS
cups

Package

Name
cups
Purl
pkg:deb/ubuntu/cups@2.4.1op1-1ubuntu4.16?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.3.3op2-7ubuntu2
2.4.1op1-1ubuntu1
2.4.1op1-1ubuntu2
2.4.1op1-1ubuntu3
2.4.1op1-1ubuntu4
2.4.1op1-1ubuntu4.1
2.4.1op1-1ubuntu4.2
2.4.1op1-1ubuntu4.4
2.4.1op1-1ubuntu4.6
2.4.1op1-1ubuntu4.7
2.4.1op1-1ubuntu4.8
2.4.1op1-1ubuntu4.9
2.4.1op1-1ubuntu4.10
2.4.1op1-1ubuntu4.11
2.4.1op1-1ubuntu4.12
2.4.1op1-1ubuntu4.15
2.4.1op1-1ubuntu4.16

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "cups",
            "binary_version": "2.4.1op1-1ubuntu4.16"
        },
        {
            "binary_name": "cups-bsd",
            "binary_version": "2.4.1op1-1ubuntu4.16"
        },
        {
            "binary_name": "cups-client",
            "binary_version": "2.4.1op1-1ubuntu4.16"
        },
        {
            "binary_name": "cups-common",
            "binary_version": "2.4.1op1-1ubuntu4.16"
        },
        {
            "binary_name": "cups-core-drivers",
            "binary_version": "2.4.1op1-1ubuntu4.16"
        },
        {
            "binary_name": "cups-daemon",
            "binary_version": "2.4.1op1-1ubuntu4.16"
        },
        {
            "binary_name": "cups-ipp-utils",
            "binary_version": "2.4.1op1-1ubuntu4.16"
        },
        {
            "binary_name": "cups-ppdc",
            "binary_version": "2.4.1op1-1ubuntu4.16"
        },
        {
            "binary_name": "cups-server-common",
            "binary_version": "2.4.1op1-1ubuntu4.16"
        },
        {
            "binary_name": "libcups2",
            "binary_version": "2.4.1op1-1ubuntu4.16"
        },
        {
            "binary_name": "libcups2-dev",
            "binary_version": "2.4.1op1-1ubuntu4.16"
        },
        {
            "binary_name": "libcupsimage2",
            "binary_version": "2.4.1op1-1ubuntu4.16"
        },
        {
            "binary_name": "libcupsimage2-dev",
            "binary_version": "2.4.1op1-1ubuntu4.16"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-27447.json"
Ubuntu:24.04:LTS
cups

Package

Name
cups
Purl
pkg:deb/ubuntu/cups@2.4.7-1.2ubuntu7.9?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.4.6-0ubuntu3
2.4.7-1.2ubuntu2
2.4.7-1.2ubuntu3
2.4.7-1.2ubuntu7
2.4.7-1.2ubuntu7.1
2.4.7-1.2ubuntu7.2
2.4.7-1.2ubuntu7.3
2.4.7-1.2ubuntu7.4
2.4.7-1.2ubuntu7.7
2.4.7-1.2ubuntu7.9

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "cups",
            "binary_version": "2.4.7-1.2ubuntu7.9"
        },
        {
            "binary_name": "cups-bsd",
            "binary_version": "2.4.7-1.2ubuntu7.9"
        },
        {
            "binary_name": "cups-client",
            "binary_version": "2.4.7-1.2ubuntu7.9"
        },
        {
            "binary_name": "cups-common",
            "binary_version": "2.4.7-1.2ubuntu7.9"
        },
        {
            "binary_name": "cups-core-drivers",
            "binary_version": "2.4.7-1.2ubuntu7.9"
        },
        {
            "binary_name": "cups-daemon",
            "binary_version": "2.4.7-1.2ubuntu7.9"
        },
        {
            "binary_name": "cups-ipp-utils",
            "binary_version": "2.4.7-1.2ubuntu7.9"
        },
        {
            "binary_name": "cups-ppdc",
            "binary_version": "2.4.7-1.2ubuntu7.9"
        },
        {
            "binary_name": "cups-server-common",
            "binary_version": "2.4.7-1.2ubuntu7.9"
        },
        {
            "binary_name": "libcups2-dev",
            "binary_version": "2.4.7-1.2ubuntu7.9"
        },
        {
            "binary_name": "libcups2t64",
            "binary_version": "2.4.7-1.2ubuntu7.9"
        },
        {
            "binary_name": "libcupsimage2-dev",
            "binary_version": "2.4.7-1.2ubuntu7.9"
        },
        {
            "binary_name": "libcupsimage2t64",
            "binary_version": "2.4.7-1.2ubuntu7.9"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-27447.json"
Ubuntu:25.10
cups

Package

Name
cups
Purl
pkg:deb/ubuntu/cups@2.4.12-0ubuntu3.5?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.4.12-0ubuntu1
2.4.12-0ubuntu2
2.4.12-0ubuntu3
2.4.12-0ubuntu3.3
2.4.12-0ubuntu3.5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "cups",
            "binary_version": "2.4.12-0ubuntu3.5"
        },
        {
            "binary_name": "cups-bsd",
            "binary_version": "2.4.12-0ubuntu3.5"
        },
        {
            "binary_name": "cups-client",
            "binary_version": "2.4.12-0ubuntu3.5"
        },
        {
            "binary_name": "cups-common",
            "binary_version": "2.4.12-0ubuntu3.5"
        },
        {
            "binary_name": "cups-core-drivers",
            "binary_version": "2.4.12-0ubuntu3.5"
        },
        {
            "binary_name": "cups-daemon",
            "binary_version": "2.4.12-0ubuntu3.5"
        },
        {
            "binary_name": "cups-ipp-utils",
            "binary_version": "2.4.12-0ubuntu3.5"
        },
        {
            "binary_name": "cups-ppdc",
            "binary_version": "2.4.12-0ubuntu3.5"
        },
        {
            "binary_name": "cups-server-common",
            "binary_version": "2.4.12-0ubuntu3.5"
        },
        {
            "binary_name": "libcups2-dev",
            "binary_version": "2.4.12-0ubuntu3.5"
        },
        {
            "binary_name": "libcups2t64",
            "binary_version": "2.4.12-0ubuntu3.5"
        },
        {
            "binary_name": "libcupsimage2-dev",
            "binary_version": "2.4.12-0ubuntu3.5"
        },
        {
            "binary_name": "libcupsimage2t64",
            "binary_version": "2.4.12-0ubuntu3.5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-27447.json"
Ubuntu:Pro:16.04:LTS
cups

Package

Name
cups
Purl
pkg:deb/ubuntu/cups@2.1.3-4ubuntu0.11+esm12?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.1.0-4ubuntu3
2.1.0-5
2.1.0-6
2.1.0-6ubuntu1
2.1.0-7
2.1.2-1
2.1.2-2
2.1.3-1
2.1.3-1build1
2.1.3-3
2.1.3-4
2.1.3-4ubuntu0.2
2.1.3-4ubuntu0.3
2.1.3-4ubuntu0.4
2.1.3-4ubuntu0.5
2.1.3-4ubuntu0.6
2.1.3-4ubuntu0.7
2.1.3-4ubuntu0.8
2.1.3-4ubuntu0.9
2.1.3-4ubuntu0.10
2.1.3-4ubuntu0.11
2.1.3-4ubuntu0.11+esm1
2.1.3-4ubuntu0.11+esm2
2.1.3-4ubuntu0.11+esm3
2.1.3-4ubuntu0.11+esm4
2.1.3-4ubuntu0.11+esm5
2.1.3-4ubuntu0.11+esm6
2.1.3-4ubuntu0.11+esm7
2.1.3-4ubuntu0.11+esm8
2.1.3-4ubuntu0.11+esm9
2.1.3-4ubuntu0.11+esm11
2.1.3-4ubuntu0.11+esm12

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "cups",
            "binary_version": "2.1.3-4ubuntu0.11+esm12"
        },
        {
            "binary_name": "cups-bsd",
            "binary_version": "2.1.3-4ubuntu0.11+esm12"
        },
        {
            "binary_name": "cups-client",
            "binary_version": "2.1.3-4ubuntu0.11+esm12"
        },
        {
            "binary_name": "cups-common",
            "binary_version": "2.1.3-4ubuntu0.11+esm12"
        },
        {
            "binary_name": "cups-core-drivers",
            "binary_version": "2.1.3-4ubuntu0.11+esm12"
        },
        {
            "binary_name": "cups-daemon",
            "binary_version": "2.1.3-4ubuntu0.11+esm12"
        },
        {
            "binary_name": "cups-ipp-utils",
            "binary_version": "2.1.3-4ubuntu0.11+esm12"
        },
        {
            "binary_name": "cups-ppdc",
            "binary_version": "2.1.3-4ubuntu0.11+esm12"
        },
        {
            "binary_name": "cups-server-common",
            "binary_version": "2.1.3-4ubuntu0.11+esm12"
        },
        {
            "binary_name": "libcups2",
            "binary_version": "2.1.3-4ubuntu0.11+esm12"
        },
        {
            "binary_name": "libcups2-dev",
            "binary_version": "2.1.3-4ubuntu0.11+esm12"
        },
        {
            "binary_name": "libcupscgi1",
            "binary_version": "2.1.3-4ubuntu0.11+esm12"
        },
        {
            "binary_name": "libcupscgi1-dev",
            "binary_version": "2.1.3-4ubuntu0.11+esm12"
        },
        {
            "binary_name": "libcupsimage2",
            "binary_version": "2.1.3-4ubuntu0.11+esm12"
        },
        {
            "binary_name": "libcupsimage2-dev",
            "binary_version": "2.1.3-4ubuntu0.11+esm12"
        },
        {
            "binary_name": "libcupsmime1",
            "binary_version": "2.1.3-4ubuntu0.11+esm12"
        },
        {
            "binary_name": "libcupsmime1-dev",
            "binary_version": "2.1.3-4ubuntu0.11+esm12"
        },
        {
            "binary_name": "libcupsppdc1",
            "binary_version": "2.1.3-4ubuntu0.11+esm12"
        },
        {
            "binary_name": "libcupsppdc1-dev",
            "binary_version": "2.1.3-4ubuntu0.11+esm12"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-27447.json"
Ubuntu:Pro:18.04:LTS
cups

Package

Name
cups
Purl
pkg:deb/ubuntu/cups@2.2.7-1ubuntu2.10+esm10?arch=source&distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.2.4-7ubuntu2
2.2.5-2
2.2.6-2
2.2.6-3
2.2.6-4
2.2.6-5
2.2.7-1ubuntu1
2.2.7-1ubuntu2
2.2.7-1ubuntu2.1
2.2.7-1ubuntu2.2
2.2.7-1ubuntu2.3
2.2.7-1ubuntu2.4
2.2.7-1ubuntu2.5
2.2.7-1ubuntu2.6
2.2.7-1ubuntu2.7
2.2.7-1ubuntu2.8
2.2.7-1ubuntu2.9
2.2.7-1ubuntu2.10
2.2.7-1ubuntu2.10+esm1
2.2.7-1ubuntu2.10+esm2
2.2.7-1ubuntu2.10+esm3
2.2.7-1ubuntu2.10+esm4
2.2.7-1ubuntu2.10+esm5
2.2.7-1ubuntu2.10+esm6
2.2.7-1ubuntu2.10+esm7
2.2.7-1ubuntu2.10+esm9
2.2.7-1ubuntu2.10+esm10

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "cups",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "cups-bsd",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "cups-client",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "cups-common",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "cups-core-drivers",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "cups-daemon",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "cups-ipp-utils",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "cups-ppdc",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "cups-server-common",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "libcups2",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "libcups2-dev",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "libcupscgi1",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "libcupsimage2",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "libcupsimage2-dev",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "libcupsmime1",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        },
        {
            "binary_name": "libcupsppdc1",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-27447.json"
Ubuntu:Pro:20.04:LTS
cups

Package

Name
cups
Purl
pkg:deb/ubuntu/cups@2.3.1-9ubuntu1.9+esm4?arch=source&distro=esm-infra/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.2.12-2ubuntu1
2.3.0-6
2.3.0-7
2.3.0-7ubuntu1
2.3.1-1ubuntu1
2.3.1-2
2.3.1-4
2.3.1-7
2.3.1-9ubuntu1
2.3.1-9ubuntu1.1
2.3.1-9ubuntu1.2
2.3.1-9ubuntu1.3
2.3.1-9ubuntu1.4
2.3.1-9ubuntu1.5
2.3.1-9ubuntu1.6
2.3.1-9ubuntu1.7
2.3.1-9ubuntu1.8
2.3.1-9ubuntu1.9
2.3.1-9ubuntu1.9+esm1
2.3.1-9ubuntu1.9+esm3
2.3.1-9ubuntu1.9+esm4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "cups",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
        },
        {
            "binary_name": "cups-bsd",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
        },
        {
            "binary_name": "cups-client",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
        },
        {
            "binary_name": "cups-common",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
        },
        {
            "binary_name": "cups-core-drivers",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
        },
        {
            "binary_name": "cups-daemon",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
        },
        {
            "binary_name": "cups-ipp-utils",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
        },
        {
            "binary_name": "cups-ppdc",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
        },
        {
            "binary_name": "cups-server-common",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
        },
        {
            "binary_name": "libcups2",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
        },
        {
            "binary_name": "libcups2-dev",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
        },
        {
            "binary_name": "libcupsimage2",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
        },
        {
            "binary_name": "libcupsimage2-dev",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-27447.json"