Vulnerability Details CVE-2026-55453
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, the backend/ipp.c quote_string() function preserves carriage-return and line-feed characters in a remote printer-controlled marker-message before report_attr() writes the value to the scheduler status stream. The scheduler can parse an injected newline as a separate PPD: control line and persist an attacker-selected PPD keyword. The reporter demonstrated that a later print job on a Foomatic-backed queue could consume an injected FoomaticRIPCommandLine value and execute in the filter context as lp. This issue is fixed in version 2.4.20.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 7.2%
CVSS Severity
CVSS v3 Score 3.3
References
- https://github.com/OpenPrinting/cups/commit/806e1b483096c51d59432468f4afdd7387d81dd7
- https://github.com/OpenPrinting/cups/commit/d41cf0616688721e9d435d54118c4c8a36ed596a
- https://github.com/OpenPrinting/cups/releases/tag/v2.4.20
- https://github.com/OpenPrinting/cups/security/advisories/GHSA-7hqf-mfhx-7r3v
Products affected by CVE-2026-55453
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cpe:2.3:a:openprinting:cups:1.0
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cpe:2.3:a:openprinting:cups:1.0.1
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cpe:2.3:a:openprinting:cups:1.0.2
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cpe:2.3:a:openprinting:cups:1.0.3
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cpe:2.3:a:openprinting:cups:1.0.4
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cpe:2.3:a:openprinting:cups:1.0.5
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cpe:2.3:a:openprinting:cups:1.1
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cpe:2.3:a:openprinting:cups:1.1.1
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cpe:2.3:a:openprinting:cups:1.1.10
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cpe:2.3:a:openprinting:cups:1.1.10.1
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cpe:2.3:a:openprinting:cups:1.1.11
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cpe:2.3:a:openprinting:cups:1.1.12
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cpe:2.3:a:openprinting:cups:1.1.13
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cpe:2.3:a:openprinting:cups:1.1.14
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cpe:2.3:a:openprinting:cups:1.1.15
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cpe:2.3:a:openprinting:cups:1.1.15.1
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cpe:2.3:a:openprinting:cups:1.1.16
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cpe:2.3:a:openprinting:cups:1.1.17
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cpe:2.3:a:openprinting:cups:1.1.18
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cpe:2.3:a:openprinting:cups:1.1.19
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cpe:2.3:a:openprinting:cups:1.1.2
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cpe:2.3:a:openprinting:cups:1.1.2.3
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cpe:2.3:a:openprinting:cups:1.1.20
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cpe:2.3:a:openprinting:cups:1.1.21
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cpe:2.3:a:openprinting:cups:1.1.22
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cpe:2.3:a:openprinting:cups:1.1.23
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cpe:2.3:a:openprinting:cups:1.1.3
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cpe:2.3:a:openprinting:cups:1.1.4
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cpe:2.3:a:openprinting:cups:1.1.5
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cpe:2.3:a:openprinting:cups:1.1.5.1
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cpe:2.3:a:openprinting:cups:1.1.5.2
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cpe:2.3:a:openprinting:cups:1.1.6
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cpe:2.3:a:openprinting:cups:1.1.6.1
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cpe:2.3:a:openprinting:cups:1.1.6.2
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cpe:2.3:a:openprinting:cups:1.1.6.3
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cpe:2.3:a:openprinting:cups:1.1.7
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cpe:2.3:a:openprinting:cups:1.1.8
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cpe:2.3:a:openprinting:cups:1.1.9
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cpe:2.3:a:openprinting:cups:1.1.9.1
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cpe:2.3:a:openprinting:cups:1.2.0
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cpe:2.3:a:openprinting:cups:1.2.1
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cpe:2.3:a:openprinting:cups:1.2.10
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cpe:2.3:a:openprinting:cups:1.2.11
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cpe:2.3:a:openprinting:cups:1.2.12
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cpe:2.3:a:openprinting:cups:1.2.2
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cpe:2.3:a:openprinting:cups:1.2.3
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cpe:2.3:a:openprinting:cups:1.2.4
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cpe:2.3:a:openprinting:cups:1.2.5
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cpe:2.3:a:openprinting:cups:1.2.6
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cpe:2.3:a:openprinting:cups:1.2.7
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cpe:2.3:a:openprinting:cups:1.2.8
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cpe:2.3:a:openprinting:cups:1.2.9
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cpe:2.3:a:openprinting:cups:1.3.0
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cpe:2.3:a:openprinting:cups:1.3.10
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cpe:2.3:a:openprinting:cups:1.3.11
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cpe:2.3:a:openprinting:cups:1.3.2
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cpe:2.3:a:openprinting:cups:1.3.3
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cpe:2.3:a:openprinting:cups:1.3.4
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cpe:2.3:a:openprinting:cups:1.3.5
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cpe:2.3:a:openprinting:cups:1.3.6
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cpe:2.3:a:openprinting:cups:1.3.7
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cpe:2.3:a:openprinting:cups:1.3.8
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cpe:2.3:a:openprinting:cups:1.3.9
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cpe:2.3:a:openprinting:cups:1.4.0
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cpe:2.3:a:openprinting:cups:1.4.1
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cpe:2.3:a:openprinting:cups:1.4.2
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cpe:2.3:a:openprinting:cups:1.4.3
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cpe:2.3:a:openprinting:cups:1.4.4
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cpe:2.3:a:openprinting:cups:1.4.5
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cpe:2.3:a:openprinting:cups:1.4.6
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cpe:2.3:a:openprinting:cups:1.4.7
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cpe:2.3:a:openprinting:cups:1.4.8
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cpe:2.3:a:openprinting:cups:1.5.0
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cpe:2.3:a:openprinting:cups:1.5.1
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cpe:2.3:a:openprinting:cups:1.5.2
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cpe:2.3:a:openprinting:cups:1.5.3
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cpe:2.3:a:openprinting:cups:1.5.4
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cpe:2.3:a:openprinting:cups:1.6.0
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cpe:2.3:a:openprinting:cups:1.6.1
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cpe:2.3:a:openprinting:cups:1.6.2
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cpe:2.3:a:openprinting:cups:1.6.3
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cpe:2.3:a:openprinting:cups:1.6.4
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cpe:2.3:a:openprinting:cups:1.7.0
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cpe:2.3:a:openprinting:cups:1.7.1
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cpe:2.3:a:openprinting:cups:1.7.2
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cpe:2.3:a:openprinting:cups:1.7.3
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cpe:2.3:a:openprinting:cups:1.7.4
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cpe:2.3:a:openprinting:cups:1.7.5
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cpe:2.3:a:openprinting:cups:2.0.0
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cpe:2.3:a:openprinting:cups:2.0.1
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cpe:2.3:a:openprinting:cups:2.0.2
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cpe:2.3:a:openprinting:cups:2.0.3
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cpe:2.3:a:openprinting:cups:2.0.4
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cpe:2.3:a:openprinting:cups:2.1.0
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cpe:2.3:a:openprinting:cups:2.1.2
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cpe:2.3:a:openprinting:cups:2.1.3
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cpe:2.3:a:openprinting:cups:2.1.4
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cpe:2.3:a:openprinting:cups:2.2.0
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cpe:2.3:a:openprinting:cups:2.2.1
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cpe:2.3:a:openprinting:cups:2.2.10
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cpe:2.3:a:openprinting:cups:2.2.11
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cpe:2.3:a:openprinting:cups:2.2.12
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cpe:2.3:a:openprinting:cups:2.2.13
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cpe:2.3:a:openprinting:cups:2.2.2
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cpe:2.3:a:openprinting:cups:2.2.3
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cpe:2.3:a:openprinting:cups:2.2.4
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cpe:2.3:a:openprinting:cups:2.2.5
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cpe:2.3:a:openprinting:cups:2.2.6
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cpe:2.3:a:openprinting:cups:2.2.7
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cpe:2.3:a:openprinting:cups:2.2.8
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cpe:2.3:a:openprinting:cups:2.2.9
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cpe:2.3:a:openprinting:cups:2.3.0
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cpe:2.3:a:openprinting:cups:2.3.1
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cpe:2.3:a:openprinting:cups:2.3.3
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cpe:2.3:a:openprinting:cups:2.4.0
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cpe:2.3:a:openprinting:cups:2.4.1
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cpe:2.3:a:openprinting:cups:2.4.10
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cpe:2.3:a:openprinting:cups:2.4.11
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cpe:2.3:a:openprinting:cups:2.4.12
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cpe:2.3:a:openprinting:cups:2.4.13
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cpe:2.3:a:openprinting:cups:2.4.14
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cpe:2.3:a:openprinting:cups:2.4.15
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cpe:2.3:a:openprinting:cups:2.4.16
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cpe:2.3:a:openprinting:cups:2.4.17
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cpe:2.3:a:openprinting:cups:2.4.18
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cpe:2.3:a:openprinting:cups:2.4.2
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cpe:2.3:a:openprinting:cups:2.4.3
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cpe:2.3:a:openprinting:cups:2.4.4
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cpe:2.3:a:openprinting:cups:2.4.5
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cpe:2.3:a:openprinting:cups:2.4.6
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cpe:2.3:a:openprinting:cups:2.4.7
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cpe:2.3:a:openprinting:cups:2.4.8
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cpe:2.3:a:openprinting:cups:2.4.9