CVE-2026-27447
OpenPrinting CUPS: Authorization bypass via case-insensitive group-member lookup
- State
- Published
- Severity
- 4.8 Medium
- Published
- Apr 3, 2026
- Updated
- Apr 6, 2026
- Reserved
- Feb 19, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 4.8 Medium | CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:L/A:N | GitHub_M |
Weaknesses
- CWE-863 Incorrect Authorization
Affected Products
| Product | Versions |
|---|---|
cupsOpenPrinting |
|
References
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