alseambusher crontab-ui - Unauthenticated RCE via Newline Injection in env_vars Parameter

{
  "id": "efc5e51245ff063f8821a93d799bed1fd646acfe7ded9f4d86190e8d15c675c8",
  "url": "https://osv.dev/vulnerability/CVE-2026-72590",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "alseambusher crontab-ui - Unauthenticated RCE via Newline Injection in env_vars Parameter",
    "summary": "An OS command injection vulnerability in alseambusher/crontab-ui through 0.4.2 allows an unauthenticated remote attacker to inject arbitrary cron job entries by sending a crafted GET request to /crontab with URL-encoded newlines in the env_vars parameter.",
    "evidence": "osv:CVE-2026-72590",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-72590",
      "aliases": [
        "CVE-2026-72590"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/alseambusher/crontab-ui",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "e1ae9d00231d78b2755dcf0182b7f7062726e8b7"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.4.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.4.2"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.4.2",
            "v0.4.1",
            "v0.4.0",
            "v0.3.16",
            "v0.3.14",
            "v0.3.13",
            "v0.3.11",
            "v0.3.10",
            "v0.3.8",
            "v0.3.7",
            "v0.3.5",
            "v0.2.1",
            "v0.2.0",
            "v0.1.9"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72590.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:27.991937640Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72590.json",
        "https://github.com/alseambusher/crontab-ui",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-72590",
        "https://github.com/alseambusher/crontab-ui/blob/master/app.js"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-93"
        ],
        "cna_assigner": "TuranSec",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72590.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-72590",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 494960,
  "published_at": "2026-08-10T10:41:45.063+00:00"
}