CVE-2026-55453

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Source
https://cve.org/CVERecord?id=CVE-2026-55453
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55453.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55453
Aliases
  • GHSA-7hqf-mfhx-7r3v
Downstream
AZL (1)
BELL (1)
CLSA (2)
DEBIAN (1)
ECHO (1)
MGASA (1)
OESA (4)
openSUSE (1)
RHSA (1)
UBUNTU (1)
Related
Published
2026-10-15T17:11:21Z
Modified
2026-10-28T11:14:50Z
Severity
  • 3.3 (Low) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L CVSS Calculator
Summary
CUPS ipp backend status-line injection can update queue PPD and lead to conditional RCE as lp via foomatic-rip
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-74",
        "CWE-77",
        "CWE-78"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55453.json"
}
References

Affected packages

Git / github.com/openprinting/cups

Affected ranges

Type
GIT
Repo
https://github.com/openprinting/cups
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
ef80eeaea51430a055948240eea3f28ef5354edf
Fixed
806e1b483096c51d59432468f4afdd7387d81dd7
Fixed
d41cf0616688721e9d435d54118c4c8a36ed596a
Database specific
Show details 
{
    "extracted_events": [
        {
            "cpe": "cpe:2.3:a:openprinting:cups:*:*:*:*:*:*:*:*",
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "2.4.20"
                }
            ],
            "source": "CPE_RANGE"
        },
        {
            "range": [
                {
                    "fixed": "806e1b483096c51d59432468f4afdd7387d81dd7"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "d41cf0616688721e9d435d54118c4c8a36ed596a"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "v2.4.20",
            "range": [
                {
                    "fixed": "ef80eeaea51430a055948240eea3f28ef5354edf"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

v2.*
v2.2.0
v2.2.1
v2.2.2
v2.2.3
v2.2.4
v2.2.5
v2.2.6
v2.2b1
v2.2b2
v2.2rc1
v2.3.0
v2.3.1
v2.3.3
v2.3.3op1
v2.3.3op2
v2.3b1
v2.3b2
v2.3b3
v2.3b4
v2.3b5
v2.3b6
v2.3b7
v2.3b8
v2.3rc1
v2.4.0
v2.4.1
v2.4.10
v2.4.11
v2.4.12
v2.4.13
v2.4.14
v2.4.15
v2.4.16
v2.4.17
v2.4.18
v2.4.19
v2.4.2
v2.4.3
v2.4.4
v2.4.5
v2.4.6
v2.4.7
v2.4.8
v2.4.9
v2.4b1
v2.4rc1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55453.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "41067780982250293306668202666179391576",
                "254489134790580924363406091842730697593",
                "205412475102394285225101579054131718926",
                "206603954577595800703188794141938698796",
                "24797886226383621995945595426545241844",
                "42983454520051377784331154603027525393",
                "333424659996185838724322519475931039526"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-55453-4903f8bf",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/openprinting/cups/commit/806e1b483096c51d59432468f4afdd7387d81dd7",
        "target": {
            "file": "backend/ipp.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "96244148601532417331063727454939067776",
            "length": 534
        },
        "id": "CVE-2026-55453-b2136794",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/openprinting/cups/commit/806e1b483096c51d59432468f4afdd7387d81dd7",
        "target": {
            "file": "backend/ipp.c",
            "function": "quote_string"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "41067780982250293306668202666179391576",
                "254489134790580924363406091842730697593",
                "205412475102394285225101579054131718926",
                "206603954577595800703188794141938698796",
                "24797886226383621995945595426545241844",
                "42983454520051377784331154603027525393",
                "333424659996185838724322519475931039526"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-55453-d0dcd401",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/openprinting/cups/commit/d41cf0616688721e9d435d54118c4c8a36ed596a",
        "target": {
            "file": "backend/ipp.c"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "96244148601532417331063727454939067776",
            "length": 534
        },
        "id": "CVE-2026-55453-e2faa91b",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/openprinting/cups/commit/d41cf0616688721e9d435d54118c4c8a36ed596a",
        "target": {
            "file": "backend/ipp.c",
            "function": "quote_string"
        }
    }
]
vanir_signatures_modified 
"2026-10-28T11:14:50Z"