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BREW-IMG2PDF-CVE-2021-29421 (GHSA-CCGM-3XW4-H5P8)

Vulnerability from osv_homebrew – Published: 2026-08-13 16:59 – Updated: 2026-09-10 00:11 – Source website
VLAI
Summary
Improper Restriction of XML External Entity Reference in pikepdf
Details

models/metadata.py in the pikepdf package 1.3.0 through 2.9.2 for Python allows XXE when parsing XMP metadata entries.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "resource": "pikepdf",
        "resource_purl": "pkg:pypi/pikepdf@10.5.1",
        "upstream_fixed_in": "2.10.0"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "img2pdf",
        "purl": "pkg:brew/img2pdf"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.6.3_1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "registry",
    "upstream_evidence": [
      {
        "ecosystem": "PyPI",
        "key": "pkg:pypi/pikepdf@10.5.1",
        "name": "pikepdf",
        "resource": "pikepdf",
        "strategy": "registry",
        "subject_version": "10.5.1"
      }
    ]
  },
  "details": "models/metadata.py in the pikepdf package 1.3.0 through 2.9.2 for Python allows XXE when parsing XMP metadata entries.",
  "id": "BREW-img2pdf-CVE-2021-29421",
  "modified": "2026-09-10T00:11:52Z",
  "published": "2026-08-13T16:59:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-29421"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pikepdf/pikepdf/commit/3f38f73218e5e782fe411ccbb3b44a793c0b343a"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-ccgm-3xw4-h5p8"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/pikepdf/pikepdf"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/advisory-database/tree/main/vulns/pikepdf/PYSEC-2021-34.yaml"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/36P4HTLBJPO524WMQWW57N3QRF4RFSJG"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3QFLBBYGEDNXJ7FS6PIWTVI4T4BUPGEQ"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Improper Restriction of XML External Entity Reference in pikepdf",
  "upstream": [
    "GHSA-ccgm-3xw4-h5p8",
    "CVE-2021-29421",
    "PYSEC-2021-34"
  ]
}



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