OliveTin OS Command Injection via Custom regex: Argument Type Bypassing Shell Safety Check

{
  "id": "3c2399f440731cb0eb5ec7d20b8abea96c0876fa5c93ab8bdfb07309a426d513",
  "url": "https://osv.dev/vulnerability/CVE-2026-67438",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "OliveTin OS Command Injection via Custom regex: Argument Type Bypassing Shell Safety Check",
    "summary": "OliveTin gives access to predefined shell commands from a web interface. From 3000.2.0 until 3000.17.0, the service/internal/executor/arguments.go checkShellArgumentSafety function does not treat regex: custom argument types as unsafe for Shell mode actions, allowing values that pass typeSafetyCheckRegex to be interpolated by wrapCommandInShell into an sh -c command string and enabling OS command injection. This issue is fixed in version 3000.17.0.",
    "evidence": "osv:CVE-2026-67438",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-67438",
      "aliases": [
        "CVE-2026-67438",
        "GHSA-xc5w-4v5w-7x65",
        "GO-2026-6145"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/olivetin/olivetin",
              "type": "GIT",
              "events": [
                {
                  "introduced": "d54f2307c7ee690e9a1d7ef853ca53a617c8867f"
                },
                {
                  "fixed": "d0075a7a8d44028793ea3384b34062b940841f24"
                },
                {
                  "fixed": "995ff79736f2bccc364448a3ece84087b550b232"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "3000.2.0"
                      },
                      {
                        "fixed": "3000.17.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "995ff79736f2bccc364448a3ece84087b550b232"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "d0075a7a8d44028793ea3384b34062b940841f24"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "3000.17.0"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3000.16.2",
            "3000.16.1",
            "3000.16.0",
            "3000.15.0",
            "3000.14.0",
            "3000.13.0",
            "3000.11.1",
            "3000.12.0",
            "3000.11.4",
            "3000.11.3",
            "3000.11.2",
            "3000.11.0",
            "3000.10.2",
            "3000.10.1",
            "3000.10.0",
            "3000.9.4",
            "3000.9.1",
            "3000.9.0",
            "3000.8.0",
            "3000.7.0",
            "3000.6.0",
            "3000.5.0",
            "3000.4.0",
            "3000.3.2",
            "3000.3.1",
            "3000.3.0",
            "3000.2.1",
            "3000.2.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67438.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.032102963Z",
      "provider": "osv",
      "references": [
        "https://github.com/OliveTin/OliveTin/releases/tag/3000.17.0",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67438.json",
        "https://github.com/OliveTin/OliveTin/security/advisories/GHSA-xc5w-4v5w-7x65",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-67438",
        "https://github.com/OliveTin/OliveTin/commit/995ff79736f2bccc364448a3ece84087b550b232"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-78"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67438.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-67438",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504293,
  "published_at": "2026-07-29T20:53:09.524+00:00"
}