CVE-2026-55453 (GCVE-0-2026-55453)

Vulnerability from cvelistv5 – Published: 2026-10-15 17:11 – Updated: 2026-10-15 17:11
VLAI
Title
CUPS ipp backend status-line injection can update queue PPD and lead to conditional RCE as lp via foomatic-rip
Summary
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.
Severity
3.3 (Low)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
CWE
  • CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
  • CWE-77 - Improper Neutralization of Special Elements used in a Command ('Command Injection')
  • CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7712 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
OpenPrinting cups Affected: < 2.4.20
guessed Create a notification for this product.
Show details on NVD website
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "cups",
          "vendor": "OpenPrinting",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.4.20"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "LOW",
            "baseScore": 3.3,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-74",
              "description": "CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component (\u0027Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-77",
              "description": "CWE-77: Improper Neutralization of Special Elements used in a Command (\u0027Command Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-78",
              "description": "CWE-78: Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-15T17:11:21.208Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/OpenPrinting/cups/security/advisories/GHSA-7hqf-mfhx-7r3v",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/OpenPrinting/cups/security/advisories/GHSA-7hqf-mfhx-7r3v"
        },
        {
          "name": "https://github.com/OpenPrinting/cups/commit/806e1b483096c51d59432468f4afdd7387d81dd7",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/OpenPrinting/cups/commit/806e1b483096c51d59432468f4afdd7387d81dd7"
        },
        {
          "name": "https://github.com/OpenPrinting/cups/commit/d41cf0616688721e9d435d54118c4c8a36ed596a",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/OpenPrinting/cups/commit/d41cf0616688721e9d435d54118c4c8a36ed596a"
        },
        {
          "name": "https://github.com/OpenPrinting/cups/releases/tag/v2.4.20",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/OpenPrinting/cups/releases/tag/v2.4.20"
        }
      ],
      "source": {
        "advisory": "GHSA-7hqf-mfhx-7r3v",
        "discovery": "UNKNOWN"
      },
      "title": "CUPS ipp backend status-line injection can update queue PPD and lead to conditional RCE as lp via foomatic-rip"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-55453",
    "datePublished": "2026-10-15T17:11:21.208Z",
    "dateReserved": "2026-06-16T22:10:37.607Z",
    "dateUpdated": "2026-10-15T17:11:21.208Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "cups",
                "vendor": "OpenPrinting",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c 2.4.20"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "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."
          }
        ],
        "id": "CVE-2026-55453",
        "lastModified": "2026-10-15T18:17:27.677",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "LOW",
                "baseScore": 3.3,
                "baseSeverity": "LOW",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 1.4,
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-10-15T18:17:27.677",
        "references": [
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/OpenPrinting/cups/commit/806e1b483096c51d59432468f4afdd7387d81dd7"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/OpenPrinting/cups/commit/d41cf0616688721e9d435d54118c4c8a36ed596a"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/OpenPrinting/cups/releases/tag/v2.4.20"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/OpenPrinting/cups/security/advisories/GHSA-7hqf-mfhx-7r3v"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Received",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-74"
              },
              {
                "lang": "en",
                "value": "CWE-77"
              },
              {
                "lang": "en",
                "value": "CWE-78"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-10-15T18:38:54+00:00",
      "cve": "CVE-2026-55453",
      "id": "CVE-2026-55453",
      "initial_release_date": "2026-10-15T17:11:21.208000+00:00",
      "product_status:known_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "cups: cups: Arbitrary code execution via newline injection in printer status messages",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-55453.json",
      "version": "3"
    }
  }
}



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