Vulnerability-Lookup

UBUNTU-CVE-2026-105326 (CVE-2026-105326)

Vulnerability from osv_ubuntu – Published: 2026-10-05 19:17 – Updated: 2026-10-08 09:54 – Source website

Details

An argument injection flaw was found in CUPS. When email notification is configured, the CUPS scheduler accepts printer subscription requests that supply a mailto notify-recipient-uri. The mailto notifier passes the recipient address to the configured sendmail program without ensuring it cannot be interpreted as command-line options. A remote attacker who can reach the CUPS service could supply a crafted recipient value starting with "-" to influence sendmail behavior. Successful exploitation depends on the installed mail transfer agent and CUPS network exposure, and may lead to execution of attacker-controlled commands with the privileges of the CUPS service user.

Severity

2.5 (Low)


                    
                      CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-105326	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-105326	REPORT
	https://github.com/OpenPrinting/cups/security/adv…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "cups",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
          },
          {
            "binary_name": "cups-bsd",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
          },
          {
            "binary_name": "cups-client",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
          },
          {
            "binary_name": "cups-common",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
          },
          {
            "binary_name": "cups-core-drivers",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
          },
          {
            "binary_name": "cups-daemon",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
          },
          {
            "binary_name": "cups-ipp-utils",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
          },
          {
            "binary_name": "cups-ppdc",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
          },
          {
            "binary_name": "cups-server-common",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
          },
          {
            "binary_name": "libcups2",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
          },
          {
            "binary_name": "libcupscgi1",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
          },
          {
            "binary_name": "libcupsimage2",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
          },
          {
            "binary_name": "libcupsmime1",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
          },
          {
            "binary_name": "libcupsppdc1",
            "binary_version": "2.1.3-4ubuntu0.11+esm13"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "cups",
        "purl": "pkg:deb/ubuntu/cups@2.1.3-4ubuntu0.11+esm13?arch=source\u0026distro=esm-infra-legacy/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.1.0-4ubuntu3",
        "2.1.0-5",
        "2.1.0-6",
        "2.1.0-6ubuntu1",
        "2.1.0-7",
        "2.1.2-1",
        "2.1.2-2",
        "2.1.3-1",
        "2.1.3-1build1",
        "2.1.3-3",
        "2.1.3-4",
        "2.1.3-4ubuntu0.2",
        "2.1.3-4ubuntu0.3",
        "2.1.3-4ubuntu0.4",
        "2.1.3-4ubuntu0.5",
        "2.1.3-4ubuntu0.6",
        "2.1.3-4ubuntu0.7",
        "2.1.3-4ubuntu0.8",
        "2.1.3-4ubuntu0.9",
        "2.1.3-4ubuntu0.10",
        "2.1.3-4ubuntu0.11",
        "2.1.3-4ubuntu0.11+esm1",
        "2.1.3-4ubuntu0.11+esm2",
        "2.1.3-4ubuntu0.11+esm3",
        "2.1.3-4ubuntu0.11+esm4",
        "2.1.3-4ubuntu0.11+esm5",
        "2.1.3-4ubuntu0.11+esm6",
        "2.1.3-4ubuntu0.11+esm7",
        "2.1.3-4ubuntu0.11+esm8",
        "2.1.3-4ubuntu0.11+esm9",
        "2.1.3-4ubuntu0.11+esm11",
        "2.1.3-4ubuntu0.11+esm12",
        "2.1.3-4ubuntu0.11+esm13"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "cups",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
          },
          {
            "binary_name": "cups-bsd",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
          },
          {
            "binary_name": "cups-client",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
          },
          {
            "binary_name": "cups-common",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
          },
          {
            "binary_name": "cups-core-drivers",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
          },
          {
            "binary_name": "cups-daemon",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
          },
          {
            "binary_name": "cups-ipp-utils",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
          },
          {
            "binary_name": "cups-ppdc",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
          },
          {
            "binary_name": "cups-server-common",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
          },
          {
            "binary_name": "libcups2",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
          },
          {
            "binary_name": "libcupscgi1",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
          },
          {
            "binary_name": "libcupsimage2",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
          },
          {
            "binary_name": "libcupsmime1",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
          },
          {
            "binary_name": "libcupsppdc1",
            "binary_version": "2.2.7-1ubuntu2.10+esm10"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "cups",
        "purl": "pkg:deb/ubuntu/cups@2.2.7-1ubuntu2.10+esm10?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.2.4-7ubuntu2",
        "2.2.5-2",
        "2.2.6-2",
        "2.2.6-3",
        "2.2.6-4",
        "2.2.6-5",
        "2.2.7-1ubuntu1",
        "2.2.7-1ubuntu2",
        "2.2.7-1ubuntu2.1",
        "2.2.7-1ubuntu2.2",
        "2.2.7-1ubuntu2.3",
        "2.2.7-1ubuntu2.4",
        "2.2.7-1ubuntu2.5",
        "2.2.7-1ubuntu2.6",
        "2.2.7-1ubuntu2.7",
        "2.2.7-1ubuntu2.8",
        "2.2.7-1ubuntu2.9",
        "2.2.7-1ubuntu2.10",
        "2.2.7-1ubuntu2.10+esm1",
        "2.2.7-1ubuntu2.10+esm2",
        "2.2.7-1ubuntu2.10+esm3",
        "2.2.7-1ubuntu2.10+esm4",
        "2.2.7-1ubuntu2.10+esm5",
        "2.2.7-1ubuntu2.10+esm6",
        "2.2.7-1ubuntu2.10+esm7",
        "2.2.7-1ubuntu2.10+esm9",
        "2.2.7-1ubuntu2.10+esm10"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "cups",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
          },
          {
            "binary_name": "cups-bsd",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
          },
          {
            "binary_name": "cups-client",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
          },
          {
            "binary_name": "cups-common",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
          },
          {
            "binary_name": "cups-core-drivers",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
          },
          {
            "binary_name": "cups-daemon",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
          },
          {
            "binary_name": "cups-ipp-utils",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
          },
          {
            "binary_name": "cups-ppdc",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
          },
          {
            "binary_name": "cups-server-common",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
          },
          {
            "binary_name": "libcups2",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
          },
          {
            "binary_name": "libcupsimage2",
            "binary_version": "2.3.1-9ubuntu1.9+esm4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "cups",
        "purl": "pkg:deb/ubuntu/cups@2.3.1-9ubuntu1.9+esm4?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.2.12-2ubuntu1",
        "2.3.0-6",
        "2.3.0-7",
        "2.3.0-7ubuntu1",
        "2.3.1-1ubuntu1",
        "2.3.1-2",
        "2.3.1-4",
        "2.3.1-7",
        "2.3.1-9ubuntu1",
        "2.3.1-9ubuntu1.1",
        "2.3.1-9ubuntu1.2",
        "2.3.1-9ubuntu1.3",
        "2.3.1-9ubuntu1.4",
        "2.3.1-9ubuntu1.5",
        "2.3.1-9ubuntu1.6",
        "2.3.1-9ubuntu1.7",
        "2.3.1-9ubuntu1.8",
        "2.3.1-9ubuntu1.9",
        "2.3.1-9ubuntu1.9+esm1",
        "2.3.1-9ubuntu1.9+esm3",
        "2.3.1-9ubuntu1.9+esm4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "cups",
            "binary_version": "2.4.1op1-1ubuntu4.21"
          },
          {
            "binary_name": "cups-bsd",
            "binary_version": "2.4.1op1-1ubuntu4.21"
          },
          {
            "binary_name": "cups-client",
            "binary_version": "2.4.1op1-1ubuntu4.21"
          },
          {
            "binary_name": "cups-common",
            "binary_version": "2.4.1op1-1ubuntu4.21"
          },
          {
            "binary_name": "cups-core-drivers",
            "binary_version": "2.4.1op1-1ubuntu4.21"
          },
          {
            "binary_name": "cups-daemon",
            "binary_version": "2.4.1op1-1ubuntu4.21"
          },
          {
            "binary_name": "cups-ipp-utils",
            "binary_version": "2.4.1op1-1ubuntu4.21"
          },
          {
            "binary_name": "cups-ppdc",
            "binary_version": "2.4.1op1-1ubuntu4.21"
          },
          {
            "binary_name": "cups-server-common",
            "binary_version": "2.4.1op1-1ubuntu4.21"
          },
          {
            "binary_name": "libcups2",
            "binary_version": "2.4.1op1-1ubuntu4.21"
          },
          {
            "binary_name": "libcupsimage2",
            "binary_version": "2.4.1op1-1ubuntu4.21"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "cups",
        "purl": "pkg:deb/ubuntu/cups@2.4.1op1-1ubuntu4.21?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.3.3op2-7ubuntu2",
        "2.4.1op1-1ubuntu1",
        "2.4.1op1-1ubuntu2",
        "2.4.1op1-1ubuntu3",
        "2.4.1op1-1ubuntu4",
        "2.4.1op1-1ubuntu4.1",
        "2.4.1op1-1ubuntu4.2",
        "2.4.1op1-1ubuntu4.4",
        "2.4.1op1-1ubuntu4.6",
        "2.4.1op1-1ubuntu4.7",
        "2.4.1op1-1ubuntu4.8",
        "2.4.1op1-1ubuntu4.9",
        "2.4.1op1-1ubuntu4.10",
        "2.4.1op1-1ubuntu4.11",
        "2.4.1op1-1ubuntu4.12",
        "2.4.1op1-1ubuntu4.15",
        "2.4.1op1-1ubuntu4.16",
        "2.4.1op1-1ubuntu4.20",
        "2.4.1op1-1ubuntu4.21"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "cups",
            "binary_version": "2.4.7-1.2ubuntu7.14"
          },
          {
            "binary_name": "cups-bsd",
            "binary_version": "2.4.7-1.2ubuntu7.14"
          },
          {
            "binary_name": "cups-client",
            "binary_version": "2.4.7-1.2ubuntu7.14"
          },
          {
            "binary_name": "cups-common",
            "binary_version": "2.4.7-1.2ubuntu7.14"
          },
          {
            "binary_name": "cups-core-drivers",
            "binary_version": "2.4.7-1.2ubuntu7.14"
          },
          {
            "binary_name": "cups-daemon",
            "binary_version": "2.4.7-1.2ubuntu7.14"
          },
          {
            "binary_name": "cups-ipp-utils",
            "binary_version": "2.4.7-1.2ubuntu7.14"
          },
          {
            "binary_name": "cups-ppdc",
            "binary_version": "2.4.7-1.2ubuntu7.14"
          },
          {
            "binary_name": "cups-server-common",
            "binary_version": "2.4.7-1.2ubuntu7.14"
          },
          {
            "binary_name": "libcups2t64",
            "binary_version": "2.4.7-1.2ubuntu7.14"
          },
          {
            "binary_name": "libcupsimage2t64",
            "binary_version": "2.4.7-1.2ubuntu7.14"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "cups",
        "purl": "pkg:deb/ubuntu/cups@2.4.7-1.2ubuntu7.14?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4.6-0ubuntu3",
        "2.4.7-1.2ubuntu2",
        "2.4.7-1.2ubuntu3",
        "2.4.7-1.2ubuntu7",
        "2.4.7-1.2ubuntu7.1",
        "2.4.7-1.2ubuntu7.2",
        "2.4.7-1.2ubuntu7.3",
        "2.4.7-1.2ubuntu7.4",
        "2.4.7-1.2ubuntu7.7",
        "2.4.7-1.2ubuntu7.9",
        "2.4.7-1.2ubuntu7.13",
        "2.4.7-1.2ubuntu7.14"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "cups",
            "binary_version": "2.4.16-1ubuntu1.3"
          },
          {
            "binary_name": "cups-bsd",
            "binary_version": "2.4.16-1ubuntu1.3"
          },
          {
            "binary_name": "cups-client",
            "binary_version": "2.4.16-1ubuntu1.3"
          },
          {
            "binary_name": "cups-common",
            "binary_version": "2.4.16-1ubuntu1.3"
          },
          {
            "binary_name": "cups-core-drivers",
            "binary_version": "2.4.16-1ubuntu1.3"
          },
          {
            "binary_name": "cups-daemon",
            "binary_version": "2.4.16-1ubuntu1.3"
          },
          {
            "binary_name": "cups-ipp-utils",
            "binary_version": "2.4.16-1ubuntu1.3"
          },
          {
            "binary_name": "cups-ppdc",
            "binary_version": "2.4.16-1ubuntu1.3"
          },
          {
            "binary_name": "cups-server-common",
            "binary_version": "2.4.16-1ubuntu1.3"
          },
          {
            "binary_name": "libcups2t64",
            "binary_version": "2.4.16-1ubuntu1.3"
          },
          {
            "binary_name": "libcupsimage2t64",
            "binary_version": "2.4.16-1ubuntu1.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "cups",
        "purl": "pkg:deb/ubuntu/cups@2.4.16-1ubuntu1.3?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4.12-0ubuntu3",
        "2.4.12-0ubuntu5",
        "2.4.16-1ubuntu1",
        "2.4.16-1ubuntu1.2",
        "2.4.16-1ubuntu1.3"
      ]
    }
  ],
  "aliases": [],
  "details": "An argument injection flaw was found in CUPS. When email notification is configured, the CUPS scheduler accepts printer subscription requests that supply a mailto notify-recipient-uri. The mailto notifier passes the recipient address to the configured sendmail program without ensuring it cannot be interpreted as command-line options. A remote attacker who can reach the CUPS service could supply a crafted recipient value starting with \"-\" to influence sendmail behavior. Successful exploitation depends on the installed mail transfer agent and CUPS network exposure, and may lead to execution of attacker-controlled commands with the privileges of the CUPS service user.",
  "id": "UBUNTU-CVE-2026-105326",
  "modified": "2026-10-08T09:54:47Z",
  "published": "2026-10-05T19:17:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-105326"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-105326"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/OpenPrinting/cups/security/advisories/GHSA-r4wf-366f-f6g3"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-105326"
  ]
}

CVE-2026-105326 (GCVE-0-2026-105326)

Vulnerability from cvelistv5 – Published: 2026-10-05 18:58 – Updated: 2026-10-07 17:20

Title

Cups: cups: argument injection in mailto notifier via notify-recipient-uri

Summary

Severity

2.5 (Low)


                        
                          CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-06 14:43 UTC

CWE

CWE-88 - Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')

Assigner

redhat CNA under the redhat root

CNA scorecard B 82/100 over 1036 records in the last 180 days details

References

6 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:77638	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-105326	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2545835	issue-trackingx_refsource_REDHAT
https://github.com/OpenPrinting/cups/commit/1244ed9
https://github.com/OpenPrinting/cups/commit/611d1bd
https://github.com/OpenPrinting/cups/security/adv…

Impacted products

4 products

Vendor	Product	Version
Red Hat	Red Hat Hardened Images	Unaffected: 2.4.19-4.3.hum1 , < * (rpm) cpe:/a:redhat:hummingbird:1
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9

Date Public

2026-10-05 08:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-105326",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-06T14:43:04.210560Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-06T14:52:10.816Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://catalog.redhat.com/software/containers/",
          "cpes": [
            "cpe:/a:redhat:hummingbird:1"
          ],
          "defaultStatus": "affected",
          "packageName": "cups-main",
          "product": "Red Hat Hardened Images",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "2.4.19-4.3.hum1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:10"
          ],
          "defaultStatus": "affected",
          "packageName": "cups",
          "product": "Red Hat Enterprise Linux 10",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:8"
          ],
          "defaultStatus": "affected",
          "packageName": "cups",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:9"
          ],
          "defaultStatus": "affected",
          "packageName": "cups",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:9"
          ],
          "defaultStatus": "affected",
          "packageName": "rhel9/cups",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat"
        }
      ],
      "datePublic": "2026-10-05T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "An argument injection flaw was found in CUPS. When email notification is configured, the CUPS scheduler accepts printer subscription requests that supply a mailto notify-recipient-uri. The mailto notifier passes the recipient address to the configured sendmail program without ensuring it cannot be interpreted as command-line options. A remote attacker who can reach the CUPS service could supply a crafted recipient value starting with \"-\" to influence sendmail behavior. Successful exploitation depends on the installed mail transfer agent and CUPS network exposure, and may lead to execution of attacker-controlled commands with the privileges of the CUPS service user."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "namespace": "https://access.redhat.com/security/updates/classification/",
              "value": "Low"
            },
            "type": "Red Hat severity rating"
          }
        },
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 2.5,
            "baseSeverity": "LOW",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-88",
              "description": "Improper Neutralization of Argument Delimiters in a Command (\u0027Argument Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-07T17:20:06.153Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "name": "RHSA-2026:77638",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:77638"
        },
        {
          "tags": [
            "vdb-entry",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/security/cve/CVE-2026-105326"
        },
        {
          "name": "RHBZ#2545835",
          "tags": [
            "issue-tracking",
            "x_refsource_REDHAT"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2545835"
        },
        {
          "url": "https://github.com/OpenPrinting/cups/commit/1244ed9"
        },
        {
          "url": "https://github.com/OpenPrinting/cups/commit/611d1bd"
        },
        {
          "url": "https://github.com/OpenPrinting/cups/security/advisories/GHSA-r4wf-366f-f6g3"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-09-13T00:00:00.000Z",
          "value": "Reported to Red Hat."
        },
        {
          "lang": "en",
          "time": "2026-10-05T08:00:00.000Z",
          "value": "Made public."
        }
      ],
      "title": "Cups: cups: argument injection in mailto notifier via notify-recipient-uri",
      "workarounds": [
        {
          "lang": "en",
          "value": "Restrict network access to the CUPS service (port 631/tcp) to trusted hosts only, and avoid exposing cupsd to untrusted networks. If email notifications are not required, do not configure mailto subscriptions or remove/disable the mailto notifier. Ensure only a trusted mail transfer agent is installed and referenced from CUPS mailto configuration. Monitor for unexpected printer subscriptions and unusual sendmail activity from the lp user."
        }
      ],
      "x_generator": {
        "engine": "cvelib 1.8.0"
      },
      "x_redhatCweChain": "CWE-88: Improper Neutralization of Argument Delimiters in a Command (\u0027Argument Injection\u0027)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2026-105326",
    "datePublished": "2026-10-05T18:58:56.161Z",
    "dateReserved": "2026-10-05T08:47:01.523Z",
    "dateUpdated": "2026-10-07T17:20:06.153Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted