Improper Authentication Affecting cups-client package, versions <2.2.7-150000.3.86.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.01% (2nd percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications

Snyk Learn

Learn about Improper Authentication vulnerabilities in an interactive lesson.

Start learning
  • Snyk IDSNYK-SLES157-CUPSCLIENT-16095669
  • published17 Apr 2026
  • disclosed16 Apr 2026

Introduced: 16 Apr 2026

NewCVE-2026-34990  (opens in a new tab)
CWE-287  (opens in a new tab)

How to fix?

Upgrade SLES:15.7 cups-client to version 2.2.7-150000.3.86.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream cups-client package and not the cups-client package as distributed by SLES. See How to fix? for SLES:15.7 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1