BREW-IREDIS-CVE-2026-115355 (GHSA-H7WW-273W-6CM8)

Vulnerability from osv_homebrew – Published: 2026-10-26 09:11 – Updated: 2026-10-27 03:25 – Source website
VLAI
Summary
Mistune: Path Traversal and XSS in Include directive
Details

The Include directive in src/mistune/directives/include.py does not validate that the resolved file path stays within the source directory, allowing path traversal via ../ sequences to read arbitrary files.

Additionally, error messages and included file contents are rendered without HTML escaping, leading to XSS even when escape=True.

Affected functions: - Path resolution (lines 27-31) - block_error() in html.py (line 140) - render_html_include() (line 72)

The Include plugin must be explicitly enabled via the plugins parameter.

References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "resource": "mistune",
        "resource_purl": "pkg:pypi/mistune@3.3.4",
        "upstream_fixed_in": "3.3.0"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "iredis",
        "purl": "pkg:brew/iredis"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.11.0"
            },
            {
              "fixed": "1.16.1_3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "registry",
    "upstream_evidence": [
      {
        "ecosystem": "PyPI",
        "key": "pkg:pypi/mistune@3.3.4",
        "name": "mistune",
        "resource": "mistune",
        "strategy": "registry",
        "subject_version": "3.3.4"
      }
    ]
  },
  "details": "The Include directive in `src/mistune/directives/include.py` does not validate that the resolved file path stays within the source directory, allowing path traversal via `../` sequences to read arbitrary files.\n\nAdditionally, error messages and included file contents are rendered without HTML escaping, leading to XSS even when `escape=True`.\n\nAffected functions:\n- Path resolution (lines 27-31)\n- `block_error()` in html.py (line 140)\n- `render_html_include()` (line 72)\n\nThe Include plugin must be explicitly enabled via the plugins parameter.",
  "id": "BREW-iredis-CVE-2026-115355",
  "modified": "2026-10-27T03:25:42Z",
  "published": "2026-10-26T09:11:43Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/lepture/mistune/security/advisories/GHSA-h7ww-273w-6cm8"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-115355"
    },
    {
      "type": "WEB",
      "url": "https://github.com/lepture/mistune/commit/1bef343ade163fc3bb95572b15be720084cdb993"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/lepture/mistune"
    },
    {
      "type": "WEB",
      "url": "https://github.com/lepture/mistune/releases/tag/v3.3.0"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/mistune-before-3.3.0-path-traversal-and-xss-via-include-directive"
    }
  ],
  "schema_version": "1.7.3",
  "summary": "Mistune: Path Traversal and XSS in Include directive",
  "upstream": [
    "GHSA-h7ww-273w-6cm8",
    "CVE-2026-115355"
  ]
}



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