ServerCo getssl ACME shell script path injection

{
  "id": "5ed150af2301e22894efe98a50e6067e9af85e9726becbef784197932ac9bd96",
  "url": "https://osv.dev/vulnerability/CVE-2026-10303",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ServerCo getssl ACME shell script path injection",
    "summary": "In ServerCo getssl version 2.49 and prior, the ACME challenge token returned to the client was not strictly validated against RFC 8555 before being used in challenge-file handling, allowing a maliciously crafted token to influence local path/filename usage during validation. An attacker who can supply ACME challenge responses to getssl (for example, a malicious or compromised CA endpoint, or an on-path adversary able to tamper with that response path) could exploit this to achieve unauthorized file write/path traversal effects, usually with elevated privileges, ultimately allowing for remote command injection. This issue appears related in spirit to CVE-2023-38198, and is an instance of CWE-73, \"External control of file name or path.\" Other ACME shell script handlers may be affected by similar issues.",
    "evidence": "osv:CVE-2026-10303",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-10303",
      "aliases": [
        "CVE-2026-10303"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/srvrco/getssl",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "b0b856df1eb1265ce56785eb1d2af880669b8788"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.49"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "b0b856df1eb1265ce56785eb1d2af880669b8788"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v2.50"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.50",
            "v2.49",
            "2.49",
            "2.48",
            "v2.47",
            "v2.46",
            "v2.45",
            "v2.44",
            "v2.43",
            "v2.41",
            "v2.39",
            "v2.38",
            "v2.37",
            "push",
            "v2.36",
            "v2.35",
            "v2.34",
            "v2.33",
            "v2.32",
            "v2.31",
            "v2.30",
            "v2.29",
            "2.29",
            "v2.28",
            "v2.27",
            "v2.26",
            "v2.24",
            "v2.22",
            "v2.21",
            "v2.20",
            "v2.19",
            "v2.18",
            "v2.17",
            "v2.16",
            "v2.15",
            "v2.14",
            "v2.13",
            "v2.12",
            "v2.11",
            "v2.10",
            "v2.09",
            "v2.03",
            "v2.00",
            "v1.92",
            "v1.87",
            "v1.85",
            "v1.84",
            "v1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-10303.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:44.379697019Z",
      "provider": "osv",
      "references": [
        "https://remyhax.xyz/posts/reproducing-lawful-tls-wiretapping/",
        "https://www.cve.org/CVERecord?id=CVE-2023-38198",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/10xxx/CVE-2026-10303.json",
        "https://github.com/srvrco/getssl/releases/tag/v2.50",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-10303",
        "https://www.runzero.com/advisories/serverco-getssl-acme-cmd-injection-cve-2026-10303/",
        "https://github.com/srvrco/getssl/pull/896",
        "https://github.com/srvrco/getssl"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-73"
        ],
        "cna_assigner": "runZero",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/10xxx/CVE-2026-10303.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-10303",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 512437,
  "published_at": "2026-06-16T18:24:43.712+00:00"
}