node-webfont — security advisory

{
  "id": "7ed3a6c3cefd797d201d3fac28ba5560da2b132130b15e64cec62ab11b30fac3",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-33036",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2026-33036",
    "summary": "fast-xml-parser allows users to process XML from JS object without C/C++ based libraries or callbacks. Versions 4.0.0-beta.3 through 5.5.5 contain a bypass vulnerability where numeric character references (&#NNN;, &#xHH;) and standard XML entities completely evade the entity expansion limits (e.g., maxTotalExpansions, maxExpandedLength) added to fix CVE-2026-26278, enabling XML entity expansion Denial of Service. The root cause is that replaceEntitiesValue() in OrderedObjParser.js only enforces expansion counting on DOCTYPE-defined entities while the lastEntities loop handling numeric/standard entities performs no counting at all. An attacker supplying 1M numeric entity references like A can force ~147MB of memory allocation and heavy CPU usage, potentially crashing the process—even when developers have configured strict limits. This issue has been fixed in version 5.5.6.",
    "evidence": "osv:UBUNTU-CVE-2026-33036",
    "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": "high",
    "structured": {
      "id": "UBUNTU-CVE-2026-33036",
      "aliases": [
        "UBUNTU-CVE-2026-33036"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/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-2026-33036.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-2026-33036.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-2026-33036.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-2026-33036.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "node-webfont",
                "binary_version": "11.4.0+dfsg2+~cs35.7.26-18"
              }
            ]
          }
        }
      ],
      "modified": "2026-10-17T12:59:58.761309040Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-33036"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2026-33036",
        "https://www.cve.org/CVERecord?id=CVE-2026-33036",
        "https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-8gc5-j5rx-235r",
        "https://github.com/NaturalIntelligence/fast-xml-parser/commit/bd26122c838e6a55e7d7ac49b4ccc01a49999a01",
        "https://github.com/NaturalIntelligence/fast-xml-parser/releases/tag/v5.5.6"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-33036",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 360058,
  "published_at": "2026-03-20T06:16:00+00:00"
}