SB2026070831 - Red Hat Enterprise Linux 8 update for cups

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Main Vulnerability Database SB2026070831

SB2026070831 - Red Hat Enterprise Linux 8 update for cups

Published: July 8, 2026

Security Bulletin ID SB2026070831
CSH Severity
High
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper input validation (CVE-ID: CVE-2026-34980)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Amber


The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to improper input validation in CUPS PostScript queue processing when handling Print-Job requests with crafted page-border attributes. A remote attacker can send a specially crafted Print-Job request containing a newline-injected page-border value to cause a PPD configuration injection, leading to arbitrary filter execution as the lp user.

The affected system must have a shared PostScript queue enabled and be exposed to the network. The attacker does not require authentication or prior privileges.


Remediation

Install update from vendor's website.

References