OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, a local unprivileged user can coerce cupsd into authenticating to an attacker-controlled localhost IPP service with a reusable Authorization: Local ... token. That token is enough to drive /admin/ requests on localhost, and the attacker can combine CUPS-Create-Local-Printer with printer-is-shared=true to persist a file:///... queue even though the normal FileDevice policy rejects such URIs. Printing to that queue gives an arbitrary root file overwrite; the PoC below uses that primitive to drop a sudoers fragment and demonstrate root command execution. At time of publication, there are no publicly available patches.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade cups | Apr 29, 2026 | Apr 3, 2026 |
| Amazon Linux Ami 2 | — | Upgrade cups-debuginfoUpgrade cups-ipptoolUpgrade cups-libsUpgrade cups-filesystemUpgrade cups-lpdUpgrade cups-clientUpgrade cups-develUpgrade cups | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade cups-lpd-debuginfoUpgrade cups-client-debuginfoUpgrade cups-develUpgrade cups-lpdUpgrade cups-libsUpgrade cups-filesystemUpgrade cups-debugsourceUpgrade cups-debuginfoUpgrade cups-clientUpgrade cups-libs-debuginfoUpgrade cups-ipptoolUpgrade cups-printerapp-debuginfoUpgrade cups-ipptool-debuginfoUpgrade cupsUpgrade cups-printerapp | May 4, 2026 | Apr 3, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Apr 3, 2026 |
| Ubuntu | — | Upgrade cupsUpgrade cups-daemon | Jun 9, 2026 | Jun 8, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Apr 3, 2026 |
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