What is CVE-2026-27447?

CVE-2026-27447 is a medium-severity vulnerability in Openprinting Cups, classified under Incorrect Authorization. CVSS score: 4.8/10. Published 2026-04-03.

How severe is CVE-2026-27447?

Medium severity. CVSS v3 base score is 4.8 out of 10.

Auth bypass in Openprinting Cups

CVE-2026-27447

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 comparis…

Vulnerability class: Broken Access Control

EPSS: 0.000 (2.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 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.

Affected products

Openprinting Cups — versions <= 2.4.16

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

https://github.com/OpenPrinting/cups/security/advisories/GHSA-v987-m8hp-phj9 (x_refsource_CONFIRM)
https://github.com/OpenPrinting/cups/commit/88516bf6d9e34cef7a64a704b856b837f70cd220 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-27447?: CVE-2026-27447 is a medium-severity vulnerability in Openprinting Cups, classified under Incorrect Authorization. CVSS score: 4.8/10. Published 2026-04-03.
How severe is CVE-2026-27447?: Medium severity. CVSS v3 base score is 4.8 out of 10.