Remote Code Execution Flaw in OpenPrinting CUPS by Linux Vendor
CVE-2026-55453

3.3LOW

Key Information:

Vendor

Openprinting

Status
Cups
Vendor
CVE Published:
15 October 2026

What is CVE-2026-55453?

OpenPrinting CUPS, an open-source printing system for Linux, is impacted by a vulnerability in the quote_string() function of backend/ipp.c. This flaw allows an attacker to inject newline characters into a remote printer-controlled message. If exploited, an attacker can manipulate the configuration to store harmful PPD keywords, leading to remote code execution in the context of the print filter. This risk is effectively mitigated in version 2.4.20, which addresses the issue.

Affected Version(s)

cups < 2.4.20

References

https://github.com/OpenPrinting/cups/security/advisories/...
x_refsource_CONFIRM
https://github.com/OpenPrinting/cups/commit/806e1b483096c...
x_refsource_MISC
https://github.com/OpenPrinting/cups/commit/d41cf06166887...
x_refsource_MISC

CVSS V3.1

Score:
3.3
Severity:
LOW
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.