Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2026-03-18 08:54

Modified

2026-03-18 09:23

Summary

Stack overflow parsing XML with deeply nested DTD content models

Details

When an Expat parser with a registered ElementDeclHandler parses an inline document type definition containing a deeply nested content model a C stack overflow occurs.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "python",
        "purl": "pkg:bitnami/python"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.15.0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "type": "CVSS_V4"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-4224"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*"
    ],
    "severity": "Medium"
  },
  "details": "When an Expat parser with a registered ElementDeclHandler parses an inline\ndocument type definition containing a deeply nested content model a C stack\noverflow occurs.",
  "id": "BIT-python-2026-4224",
  "modified": "2026-03-18T09:23:06.258Z",
  "published": "2026-03-18T08:54:58.205Z",
  "references": [
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/03/16/4"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/196edfb06a7458377d4d0f4b3cd41724c1f3bd4a"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/e0a8a6da90597a924b300debe045cdb4628ee1f3"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/commit/eb0e8be3a7e11b87d198a2c3af1ed0eccf532768"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/issues/145986"
    },
    {
      "type": "WEB",
      "url": "https://github.com/python/cpython/pull/145987"
    },
    {
      "type": "WEB",
      "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/5M7CGUW3XBRY7II4DK43KF7NQQ3TPZ6R/"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4224"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Stack overflow parsing XML with deeply nested DTD content models"
}

CVE-2026-4224 (GCVE-0-2026-4224)

Vulnerability from cvelistv5 – Published: 2026-03-16 17:52 – Updated: 2026-03-16 23:08

Title

Stack overflow parsing XML with deeply nested DTD content models

Summary

When an Expat parser with a registered ElementDeclHandler parses an inline document type definition containing a deeply nested content model a C stack overflow occurs.

Severity ?

6 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CWE

CWE-674 - Uncontrolled Recursion

Assigner

PSF

References

URL

Tags

	https://github.com/python/cpython/commit/eb0e8be3…	patch
	https://mail.python.org/archives/list/security-an…	vendor-advisory
	https://github.com/python/cpython/issues/145986	issue-tracking
	https://github.com/python/cpython/pull/145987	patch
	https://github.com/python/cpython/commit/196edfb0…	patch
	https://github.com/python/cpython/commit/e0a8a6da…	patch

Impacted products

	Vendor	Product	Version
	Python Software Foundation	CPython	Affected: 0 , < 3.15.0 (python)

Credits

Gil Portnoy Stan Ulbrych Bénédikt Tran Stan Ulbrych

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-4224",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-16T18:20:48.548008Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-674",
                "description": "CWE-674 Uncontrolled Recursion",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-16T18:21:11.567Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2026-03-16T23:08:21.692Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/03/16/4"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "CPython",
          "repo": "https://github.com/python/cpython",
          "vendor": "Python Software Foundation",
          "versions": [
            {
              "lessThan": "3.15.0",
              "status": "affected",
              "version": "0",
              "versionType": "python"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Gil Portnoy"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Stan Ulbrych"
        },
        {
          "lang": "en",
          "type": "remediation reviewer",
          "value": "B\u00e9n\u00e9dikt Tran"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "Stan Ulbrych"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "When an Expat parser with a registered ElementDeclHandler parses an inline\ndocument type definition containing a deeply nested content model a C stack\noverflow occurs."
            }
          ],
          "value": "When an Expat parser with a registered ElementDeclHandler parses an inline\ndocument type definition containing a deeply nested content model a C stack\noverflow occurs."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-16T17:59:17.205Z",
        "orgId": "28c92f92-d60d-412d-b760-e73465c3df22",
        "shortName": "PSF"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/eb0e8be3a7e11b87d198a2c3af1ed0eccf532768"
        },
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/5M7CGUW3XBRY7II4DK43KF7NQQ3TPZ6R/"
        },
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/python/cpython/issues/145986"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/pull/145987"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/196edfb06a7458377d4d0f4b3cd41724c1f3bd4a"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/python/cpython/commit/e0a8a6da90597a924b300debe045cdb4628ee1f3"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Stack overflow parsing XML with deeply nested DTD content models",
      "x_generator": {
        "engine": "Vulnogram 0.6.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "28c92f92-d60d-412d-b760-e73465c3df22",
    "assignerShortName": "PSF",
    "cveId": "CVE-2026-4224",
    "datePublished": "2026-03-16T17:52:26.639Z",
    "dateReserved": "2026-03-15T18:10:54.886Z",
    "dateUpdated": "2026-03-16T23:08:21.692Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

Vulnerability from bitnami_vulndb

CVE-2026-4224 (GCVE-0-2026-4224)

Tags

Sightings

Nomenclature