Arbitrary Argument Injection Affecting cups-printerapp package, versions <0:2.4.19-4.6.hum1


Severity

Recommended
0.0
low
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.17% (7th percentile)

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  • Snyk IDSNYK-RHEL10-CUPSPRINTERAPP-21179616
  • published18 Oct 2026
  • disclosed15 Oct 2026

Introduced: 15 Oct 2026

NewCVE-2026-55467  (opens in a new tab)
CWE-88  (opens in a new tab)

How to fix?

Upgrade RHEL:10 cups-printerapp to version 0:2.4.19-4.6.hum1 or higher.
This issue was patched in RHSA-2026:84421.

NVD Description

Note: Versions mentioned in the description apply only to the upstream cups-printerapp package and not the cups-printerapp package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, the cupsdCreateJob option-string builder in scheduler/job.c maps attacker-controlled destination-uri and pre-dial-string values from a configured fax queue to the phone and faxPrefix options. Unlike ordinary IPP job attributes, these mapped fax values bypass the control-character sanitizer and are copied directly into the filter options argument. A user permitted to submit a job can therefore inject control characters into the downstream option stream. The reporter states that a downstream fax filter passing these values to a shell or modem command could execute code as lp, while the maintainer states that CUPS has no confidentiality or integrity impact because the only known code-executing filter is optional Foomatic and addressed separately, leaving possible disruption of the affected queue. This issue is fixed in version 2.4.20.

CVSS Base Scores

version 3.1