Two case-insensitive comparisons on request-derived usernames outside the main authorization path in CUPS's scheduler (printer ACL validation and private-attribute filtering) could allow bypass of username-based access controls in certain configurations.

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Fixes

Solution

No solution given by the vendor.


Workaround

Fixed on upstream master branch with commit f56844d and for versions 2.4.x with commit 88e67c0.

History

Thu, 10 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Low


Wed, 09 Sep 2026 23:30:00 +0000


Wed, 09 Sep 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 09 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Description Two case-insensitive comparisons on request-derived usernames outside the main authorization path in CUPS's scheduler (printer ACL validation and private-attribute filtering) could allow bypass of username-based access controls in certain configurations.
Title Cups: openprinting cups: remaining case-insensitive username matching in scheduler side paths (cve-2026-27447 follow-up)
First Time appeared Redhat
Redhat enterprise Linux
Redhat hummingbird
Redhat openshift
Weaknesses CWE-178
CPEs cpe:/a:redhat:hummingbird:1
cpe:/a:redhat:openshift:4
cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
Redhat hummingbird
Redhat openshift
References
Metrics cvssV3_1

{'score': 3, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-09-10T17:27:20.146Z

Reserved: 2026-09-09T13:58:06.399Z

Link: CVE-2026-87876

cve-icon Vulnrichment

Updated: 2026-09-09T18:10:01.126Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-09T17:17:53.377

Modified: 2026-09-10T00:17:23.287

Link: CVE-2026-87876

cve-icon Redhat

Severity : Low

Publid Date: 2026-09-09T00:00:00Z

Links: CVE-2026-87876 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-09T18:30:13Z

Weaknesses