CVE-2026-27447
Publication date 3 April 2026
Last updated 8 June 2026
Ubuntu priority
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 | 26.04 LTS resolute |
Fixed 2.4.16-1ubuntu1.2
|
| 25.10 questing |
Fixed 2.4.12-0ubuntu3.9
|
|
| 24.04 LTS noble |
Fixed 2.4.7-1.2ubuntu7.13
|
|
| 22.04 LTS jammy |
Fixed 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
| 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)
- USN-8405-1
- CUPS vulnerabilities
- 8 June 2026