CVE-2026-27447

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Source
https://cve.org/CVERecord?id=CVE-2026-27447
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-27447.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-27447
Aliases
  • GHSA-v987-m8hp-phj9
Downstream
Published
2026-04-03T21:11:59.734Z
Modified
2026-04-11T12:47:54.266508Z
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
Summary
OpenPrinting CUPS: Authorization bypass via case-insensitive group-member lookup
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.

Database specific 
{
    "cwe_ids": [
        "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27447.json",
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/openprinting/cups

Affected ranges

Type
GIT
Repo
https://github.com/openprinting/cups
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
7523763f00d2063f88026d93bc5b29806240de2b
Database specific 
{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "2.4.16"
        }
    ]
}

Affected versions

v2.*
v2.2.0
v2.2.1
v2.2.2
v2.2.3
v2.2.4
v2.2.5
v2.2.6
v2.2b1
v2.2b2
v2.2rc1
v2.3.0
v2.3.1
v2.3.3
v2.3.3op1
v2.3.3op2
v2.3b1
v2.3b2
v2.3b3
v2.3b4
v2.3b5
v2.3b6
v2.3b7
v2.3b8
v2.3rc1
v2.4.0
v2.4.1
v2.4.10
v2.4.11
v2.4.12
v2.4.13
v2.4.14
v2.4.15
v2.4.16
v2.4.2
v2.4.3
v2.4.4
v2.4.5
v2.4.6
v2.4.7
v2.4.8
v2.4.9
v2.4b1
v2.4rc1

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-27447.json"