Home

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.

PUBLISHED Reserved 2026-02-19 | Published 2026-04-03 | Updated 2026-04-06 | Assigner GitHub_M




MEDIUM: 4.8CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:L/A:N

Problem types

CWE-863: Incorrect Authorization

Product status

<= 2.4.16
affected

References

github.com/...g/cups/security/advisories/GHSA-v987-m8hp-phj9

github.com/...ommit/88516bf6d9e34cef7a64a704b856b837f70cd220

cve.org (CVE-2026-27447)

nvd.nist.gov (CVE-2026-27447)

Download JSON