{"id":"CVE-2026-105326","title":"An argument injection flaw was found in CUPS","summary":"An argument injection flaw was found in CUPS. When email notification is configured, the CUPS scheduler accepts printer subscription requests that supply a mailto notify-recipient-uri. The mailto notifier passes the recipient address to …","severity":"low","cvss":2.5,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","cwe":["CWE-88"],"vendor":"Red Hat","product":"cups","affected":["cups (all versions)","cups (all versions)","cups (all versions)","rhel9/cups (all versions)","cups (all versions)"],"published":"2026-10-05","updated":"2026-10-05","sourceUpdated":"2026-10-05T19:17:16.393","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-105326","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-105326","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2545835","label":"secalert@redhat.com"},{"url":"https://github.com/OpenPrinting/cups/commit/1244ed9","label":"secalert@redhat.com"},{"url":"https://github.com/OpenPrinting/cups/commit/611d1bd","label":"secalert@redhat.com"},{"url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-r4wf-366f-f6g3","label":"secalert@redhat.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-05T19:30:59.978Z","slug":"CVE-2026-105326","body":"## Overview\n\nAn argument injection flaw was found in CUPS. When email notification is configured, the CUPS scheduler accepts printer subscription requests that supply a mailto notify-recipient-uri. The mailto notifier passes the recipient address to the configured sendmail program without ensuring it cannot be interpreted as command-line options. A remote attacker who can reach the CUPS service could supply a crafted recipient value starting with \"-\" to influence sendmail behavior. Successful exploitation depends on the installed mail transfer agent and CUPS network exposure, and may lead to execution of attacker-controlled commands with the privileges of the CUPS service user.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":14,"depthScoreParts":{"impact":13.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}