CVE-2026-27447

Publication date 3 April 2026

Last updated 8 June 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

4.8 · Medium

Score breakdown

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.

Status

Package Ubuntu Release Status
cups 26.10 stonking
Not affected
26.04 LTS resolute
Fixed in 2.4.16-1ubuntu1.2
25.10 questing
Fixed in 2.4.12-0ubuntu3.9
24.04 LTS noble
Fixed in 2.4.7-1.2ubuntu7.13
22.04 LTS jammy
Fixed in 2.4.1op1-1ubuntu4.20
20.04 LTS focal
Needs evaluation
18.04 LTS bionic
Needs evaluation
16.04 LTS xenial
Needs evaluation

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
cups

Severity score breakdown

CVSS version: CVSS v3.0

Base score 4.8 · Medium

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

References

Related Ubuntu Security Notices (USN)

Other references

Access our resources on patching vulnerabilities