CVE-2026-27447

6.3 mediumEPSS 0.3%

Medium (6.3) in openprinting cups. EPSS 0.3% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

6.3 medium

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

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 22% of CVEs (scores of 2026-10-31)
CWE: CWE-863
Published: 2026-04-03
Modified: 2026-07-24
Record from: the NVD, synced 2026-10-19

Affected

openprinting:cups

References

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

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