Detections
Analytics

Echo: cups: security update to 2.4.20-1

low Tenable Self-Hosted Container Security Plugin ID 474880

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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. (CVE-2026-55467)

Solution

Update the cups library and its related packages to version 2.4.20-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-55467

Plugin Details

Severity: Low

ID: 474880

Version: Revision 1.2

Type: Local

Published: 10/16/2026

Updated: 10/21/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Low

Base Score: 1

Temporal Score: 0.8

Vector: CVSS2#AV:L/AC:H/Au:S/C:N/I:N/A:P

CVSS Score Source: CVE-2026-55467

CVSS v3

Risk Factor: Low

Base Score: 2.5

Temporal Score: 2.3

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/16/2026

Vulnerability Publication Date: 10/15/2026

Reference Information

CVE: CVE-2026-55467