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

{
  "id": "777c8035e4d7542ea8e2d82ad9d40346a9972241805ec003e07777f457153c72",
  "url": "https://osv.dev/vulnerability/CVE-2026-105326",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Cups: cups: argument injection in mailto notifier via notify-recipient-uri",
    "summary": "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.",
    "evidence": "osv:CVE-2026-105326",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2026-105326",
      "aliases": [
        "CVE-2026-105326",
        "GHSA-r4wf-366f-f6g3"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openprinting/cups",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1244ed9"
                },
                {
                  "fixed": "611d1bd"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "fixed": "1244ed9"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "611d1bd"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-105326.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:26.469656787Z",
      "provider": "osv",
      "references": [
        "https://access.redhat.com/downloads/content/package-browser/",
        "https://catalog.redhat.com/software/containers/",
        "https://access.redhat.com/errata/RHSA-2026:77638",
        "https://access.redhat.com/security/cve/CVE-2026-105326",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105326.json",
        "https://github.com/OpenPrinting/cups/security/advisories/GHSA-r4wf-366f-f6g3",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-105326",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2545835",
        "https://github.com/OpenPrinting/cups/commit/1244ed9",
        "https://github.com/OpenPrinting/cups/commit/611d1bd"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-88"
        ],
        "cna_assigner": "redhat",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "2.4.19-4.3.hum1"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "InverseAffectedRanges"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105326.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-105326",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 492969,
  "published_at": "2026-10-05T18:58:56.161+00:00"
}