xhtml2pdf before 0.2.19 OS Command Injection via startViewer File Name

{
  "id": "59dfaddeea35e8db920f6d7f58f446b85fcad125f2d2392c1aeff09b2ce83bbd",
  "url": "https://osv.dev/vulnerability/CVE-2026-110642",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "xhtml2pdf before 0.2.19 OS Command Injection via startViewer File Name",
    "summary": "xhtml2pdf before 0.2.19 contains an OS command injection vulnerability in pisa.startViewer() that allows attackers to execute commands by interpolating unescaped file names into os.system. Attackers can supply an input file whose name contains a double quote and shell metacharacters, which runs OS commands as the invoking user when the pisa tool is used with -s/--start-viewer.",
    "evidence": "osv:CVE-2026-110642",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-110642",
      "aliases": [
        "CVE-2026-110642"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/xhtml2pdf/xhtml2pdf",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "ee609b0da20ac78a5a9abab8a932d547e2e6fecf"
                },
                {
                  "fixed": "f86380dad15b3a6810201d08755a3ee6b19d5063"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.2.19"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "f86380dad15b3a6810201d08755a3ee6b19d5063"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "ee609b0da20ac78a5a9abab8a932d547e2e6fecf"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v0.2.19"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.2.17",
            "v0.2.13",
            "v0.2.12",
            "v0.2.11",
            "0.2.10",
            "0.2.9",
            "v0.2.8",
            "v0.2.7",
            "v0.2.6",
            "v0.2.5",
            "0.2.5",
            "0.2.4",
            "0.2.2",
            "0.2.1",
            "0.2",
            "0.2b",
            "0.1b2",
            "0.1b1",
            "0.0.6",
            "0.0.5",
            "0.0.4",
            "0.0.3",
            "0.0.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-110642.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:33.040157248Z",
      "provider": "osv",
      "references": [
        "https://pypi.org",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110642.json",
        "https://github.com/xhtml2pdf/xhtml2pdf/releases/tag/v0.2.19",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-110642",
        "https://www.vulncheck.com/advisories/xhtml2pdf-before-0.2.19-os-command-injection-via-startviewer-file-name",
        "https://github.com/xhtml2pdf/xhtml2pdf/commit/f86380dad15b3a6810201d08755a3ee6b19d5063",
        "https://github.com/xhtml2pdf/xhtml2pdf/pull/835",
        "https://github.com/xhtml2pdf/xhtml2pdf",
        "https://github.com/xhtml2pdf/xhtml2pdf/blob/v0.2.18/xhtml2pdf/pisa.py#L393-L400"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-78"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110642.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-110642",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 499986,
  "published_at": "2026-10-14T14:17:12.576+00:00"
}