Unrated

DEBIAN-CVE-2026-33036

Type: advisorySource: OSV1 source record

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.

Announced 20 Mar 2026Group revision 1

Original source ↗

DEBIAN-CVE-2026-33036

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-33036

node-webfont

Source reference: /affected/0/package/name

Affected versions: 11.4.0+dfsg2+~cs35.7.26-10
Source reference: /affected/0/versions
11.4.0+dfsg2+~cs35.7.26-11
Source reference: /affected/0/versions
11.4.0+dfsg2+~cs35.7.26-12
Source reference: /affected/0/versions
11.4.0+dfsg2+~cs35.7.26-13
Source reference: /affected/0/versions
11.4.0+dfsg2+~cs35.7.26-14
Source reference: /affected/0/versions
11.4.0+dfsg2+~cs35.7.26-15
Source reference: /affected/0/versions
11.4.0+dfsg2+~cs35.7.26-16
Source reference: /affected/0/versions
11.4.0+dfsg2+~cs35.7.26-18
Source reference: /affected/0/versions
11.4.0+dfsg2+~cs35.7.26-19
Source reference: /affected/0/versions
11.4.0+dfsg2+~cs35.7.26-20
Source reference: /affected/0/versions
11.4.0+dfsg2+~cs35.7.26-21
Source reference: /affected/0/versions
11.4.0+dfsg2+~cs35.7.26-7
Source reference: /affected/0/versions
11.4.0+dfsg2+~cs35.7.26-8
Source reference: /affected/0/versions
11.4.0+dfsg2+~cs35.7.26-9
Source reference: /affected/0/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

node-webfont

Source reference: /affected/1/package/name

Affected versions: 11.4.0+dfsg2+~cs35.7.26-13
Source reference: /affected/1/versions
11.4.0+dfsg2+~cs35.7.26-14
Source reference: /affected/1/versions
11.4.0+dfsg2+~cs35.7.26-15
Source reference: /affected/1/versions
11.4.0+dfsg2+~cs35.7.26-16
Source reference: /affected/1/versions
11.4.0+dfsg2+~cs35.7.26-18
Source reference: /affected/1/versions
11.4.0+dfsg2+~cs35.7.26-19
Source reference: /affected/1/versions
11.4.0+dfsg2+~cs35.7.26-20
Source reference: /affected/1/versions
11.4.0+dfsg2+~cs35.7.26-21
Source reference: /affected/1/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

node-webfont

Source reference: /affected/2/package/name

Affected versions: 11.4.0+dfsg2+~cs35.7.26-13
Source reference: /affected/2/versions
11.4.0+dfsg2+~cs35.7.26-14
Source reference: /affected/2/versions
11.4.0+dfsg2+~cs35.7.26-15
Source reference: /affected/2/versions
11.4.0+dfsg2+~cs35.7.26-16
Source reference: /affected/2/versions
11.4.0+dfsg2+~cs35.7.26-18
Source reference: /affected/2/versions
11.4.0+dfsg2+~cs35.7.26-19
Source reference: /affected/2/versions
11.4.0+dfsg2+~cs35.7.26-20
Source reference: /affected/2/versions
11.4.0+dfsg2+~cs35.7.26-21
Source reference: /affected/2/versions
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "node-webfont",
      "purl": "pkg:deb/debian/node-webfont?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "11.4.0+dfsg2+~cs35.7.26-10",
      "11.4.0+dfsg2+~cs35.7.26-11",
      "11.4.0+dfsg2+~cs35.7.26-12",
      "11.4.0+dfsg2+~cs35.7.26-13",
      "11.4.0+dfsg2+~cs35.7.26-14",
      "11.4.0+dfsg2+~cs35.7.26-15",
      "11.4.0+dfsg2+~cs35.7.26-16",
      "11.4.0+dfsg2+~cs35.7.26-18",
      "11.4.0+dfsg2+~cs35.7.26-19",
      "11.4.0+dfsg2+~cs35.7.26-20",
      "11.4.0+dfsg2+~cs35.7.26-21",
      "11.4.0+dfsg2+~cs35.7.26-7",
      "11.4.0+dfsg2+~cs35.7.26-8",
      "11.4.0+dfsg2+~cs35.7.26-9"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33036.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "node-webfont",
      "purl": "pkg:deb/debian/node-webfont?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "11.4.0+dfsg2+~cs35.7.26-13",
      "11.4.0+dfsg2+~cs35.7.26-14",
      "11.4.0+dfsg2+~cs35.7.26-15",
      "11.4.0+dfsg2+~cs35.7.26-16",
      "11.4.0+dfsg2+~cs35.7.26-18",
      "11.4.0+dfsg2+~cs35.7.26-19",
      "11.4.0+dfsg2+~cs35.7.26-20",
      "11.4.0+dfsg2+~cs35.7.26-21"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33036.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "node-webfont",
      "purl": "pkg:deb/debian/node-webfont?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "11.4.0+dfsg2+~cs35.7.26-13",
      "11.4.0+dfsg2+~cs35.7.26-14",
      "11.4.0+dfsg2+~cs35.7.26-15",
      "11.4.0+dfsg2+~cs35.7.26-16",
      "11.4.0+dfsg2+~cs35.7.26-18",
      "11.4.0+dfsg2+~cs35.7.26-19",
      "11.4.0+dfsg2+~cs35.7.26-20",
      "11.4.0+dfsg2+~cs35.7.26-21"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-33036.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event: #56763 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 16:49:39 GMT
Publisher date: Fri, 20 Mar 2026 06:16:11 GMT

Read the original announcement

Revision history

25 Oct 2026DEBIAN-CVE-2026-33036 · Revision 1Source updated