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CVE-2026-27447

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CVE-2026-27447

Published: Apr 3, 2026

Modified: Apr 6, 2026

PUBLISHED

CVSS v3.1

4.8

MEDIUM

Description

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.

VendorProductVersions

OpenPrinting

cups

affected
<= 2.4.16

Weaknesses (CWE)

CWE-863

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:L/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

High

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

Low

Availability

None

References

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