{"id":"AZL-81825","summary":"CVE-2026-34990 affecting package cups for versions less than 2.4.17-1","details":"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.","modified":"2026-08-28T17:47:34.552872284Z","published":"2026-04-03T22:16:27Z","upstream":["CVE-2026-34990"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34990"}],"affected":[{"package":{"name":"cups","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/cups"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.17-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-81825.json"}}],"schema_version":"1.9.0"}