{"id":"CVE-2026-27447","title":"OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems","summary":"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 compar…","severity":"medium","cvss":4.8,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:L/A:N","cwe":["CWE-863"],"vendor":"openprinting","product":"cups","affected":["cups <= 2.4.16"],"published":"2026-04-03","updated":"2026-07-24","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-27447","references":[{"url":"https://github.com/OpenPrinting/cups/commit/88516bf6d9e34cef7a64a704b856b837f70cd220","label":"security-advisories@github.com"},{"url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-v987-m8hp-phj9","label":"security-advisories@github.com"}],"tags":["nvd"],"epss":0.00317,"epssPercentile":0.2487,"ingestedAt":"2026-07-25T22:05:04.986Z","slug":"CVE-2026-27447","body":"## Overview\n\nOpenPrinting 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.\n\n## Affected\n\n- `cups <= 2.4.16`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":26.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}