node-webfont — security advisory

{
  "id": "9eed500d4eb5d16ee7b5759f13600b3e52d7b5b0941932fb044fe852f8924dec",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-33349",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2026-33349",
    "summary": "fast-xml-parser allows users to process XML from JS object without C/C++ based libraries or callbacks. From version 4.0.0-beta.3 to before version 5.5.7, the DocTypeReader in fast-xml-parser uses JavaScript truthy checks to evaluate maxEntityCount and maxEntitySize configuration limits. When a developer explicitly sets either limit to 0 — intending to disallow all entities or restrict entity size to zero bytes — the falsy nature of 0 in JavaScript causes the guard conditions to short-circuit, completely bypassing the limits. An attacker who can supply XML input to such an application can trigger unbounded entity expansion, leading to memory exhaustion and denial of service. This issue has been patched in version 5.5.7.",
    "evidence": "osv:UBUNTU-CVE-2026-33349",
    "products": [
      {
        "name": {
          "value": "node-webfont",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "11.4.0+dfsg2+~cs35.7.26-7ubuntu1",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "node-webfont",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "11.4.0+dfsg2+~cs35.7.26-10",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "11.4.0+dfsg2+~cs35.7.26-13ubuntu2",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "node-webfont",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "11.4.0+dfsg2+~cs35.7.26-18",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "11.4.0+dfsg2+~cs35.7.26-19",
            "evidence": "/affected/2/versions"
          }
        ]
      },
      {
        "name": {
          "value": "node-webfont",
          "evidence": "/affected/3/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "11.4.0+dfsg2+~cs35.7.26-13ubuntu2",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "11.4.0+dfsg2+~cs35.7.26-14",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "11.4.0+dfsg2+~cs35.7.26-15",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "11.4.0+dfsg2+~cs35.7.26-16build1",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "11.4.0+dfsg2+~cs35.7.26-18",
            "evidence": "/affected/3/versions"
          }
        ]
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "UBUNTU-CVE-2026-33349",
      "aliases": [
        "UBUNTU-CVE-2026-33349"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
        },
        {
          "type": "Ubuntu",
          "score": "medium"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "node-webfont",
            "purl": "pkg:deb/ubuntu/node-webfont?arch=source&distro=noble",
            "ecosystem": "Ubuntu:24.04:LTS"
          },
          "versions": [
            "11.4.0+dfsg2+~cs35.7.26-7ubuntu1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33349.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "node-webfont",
                "binary_version": "11.4.0+dfsg2+~cs35.7.26-7ubuntu1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "node-webfont",
            "purl": "pkg:deb/ubuntu/node-webfont?arch=source&distro=questing",
            "ecosystem": "Ubuntu:25.10"
          },
          "versions": [
            "11.4.0+dfsg2+~cs35.7.26-10",
            "11.4.0+dfsg2+~cs35.7.26-13ubuntu2"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33349.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "node-webfont",
                "binary_version": "11.4.0+dfsg2+~cs35.7.26-13ubuntu2"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "node-webfont",
            "purl": "pkg:deb/ubuntu/node-webfont?arch=source&distro=stonking",
            "ecosystem": "Ubuntu:26.10"
          },
          "versions": [
            "11.4.0+dfsg2+~cs35.7.26-18",
            "11.4.0+dfsg2+~cs35.7.26-19"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33349.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "node-webfont",
                "binary_version": "11.4.0+dfsg2+~cs35.7.26-19"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "node-webfont",
            "purl": "pkg:deb/ubuntu/node-webfont?arch=source&distro=resolute",
            "ecosystem": "Ubuntu:26.04:LTS"
          },
          "versions": [
            "11.4.0+dfsg2+~cs35.7.26-13ubuntu2",
            "11.4.0+dfsg2+~cs35.7.26-14",
            "11.4.0+dfsg2+~cs35.7.26-15",
            "11.4.0+dfsg2+~cs35.7.26-16build1",
            "11.4.0+dfsg2+~cs35.7.26-18"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33349.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "node-webfont",
                "binary_version": "11.4.0+dfsg2+~cs35.7.26-18"
              }
            ]
          }
        }
      ],
      "modified": "2026-10-17T12:58:10.614521227Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-33349"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2026-33349",
        "https://www.cve.org/CVERecord?id=CVE-2026-33349",
        "https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-jp2q-39xq-3w4g",
        "https://github.com/NaturalIntelligence/fast-xml-parser/commit/239b64aa1fc5c5455ddebbbb54a187eb68c9fdb7"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-33349",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 358283,
  "published_at": "2026-03-24T20:16:00+00:00"
}