CVE-2026-27447

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.

CVSS v3 4.8 MEDIUM

4.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.5 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required HIGH

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/OpenPrinting/cups/commit/88516bf6d9e34cef7a64a704b856b837f70cd220	Patch
https://github.com/OpenPrinting/cups/security/advisories/GHSA-v987-m8hp-phj9	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:openprinting:cups:*:*:*:*:*:*:*:*

History

22 Apr 2026, 16:20

Type	Values Removed	Values Added
CPE		cpe:2.3:a:openprinting:cups::::::::
First Time		Openprinting cups Openprinting
References	~~() https://github.com/OpenPrinting/cups/commit/88516bf6d9e34cef7a64a704b856b837f70cd220 -~~	() https://github.com/OpenPrinting/cups/commit/88516bf6d9e34cef7a64a704b856b837f70cd220 - Patch
References	~~() https://github.com/OpenPrinting/cups/security/advisories/GHSA-v987-m8hp-phj9 -~~	() https://github.com/OpenPrinting/cups/security/advisories/GHSA-v987-m8hp-phj9 - Exploit, Vendor Advisory

03 Apr 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-03 22:16

Updated : 2026-04-22 16:20

NVD link : CVE-2026-27447

Mitre link : CVE-2026-27447

CVE.ORG link : CVE-2026-27447

JSON object : View

Products Affected

openprinting

cups

CWE

CWE-863

Incorrect Authorization

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