Vulnerability-Lookup

OESA-2026-2008 (CVE-2026-41066)

Vulnerability from osv_openeuler – Published: 2026-04-25 11:11 – Updated: 2026-08-06 11:11 – Source website

Summary

python-lxml security update

Details

Security Fix(es):

lxml is a library for processing XML and HTML in the Python language. Prior to 6.1.0, using either of the two parsers in the default configuration (with resolve_entities=True) allows untrusted XML input to read local files. Setting the resolve_entities option explicitly to resolve_entities='internal' or resolve_entities=False disables the local file access. This vulnerability is fixed in 6.1.0.(CVE-2026-41066)

Severity

7.5 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-41066	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "python-lxml-debuginfo-5.1.0-4.oe2403.aarch64.rpm",
          "python-lxml-debugsource-5.1.0-4.oe2403.aarch64.rpm",
          "python-lxml-help-5.1.0-4.oe2403.aarch64.rpm",
          "python3-lxml-5.1.0-4.oe2403.aarch64.rpm"
        ],
        "src": [
          "python-lxml-5.1.0-4.oe2403.src.rpm"
        ],
        "x86_64": [
          "python-lxml-debuginfo-5.1.0-4.oe2403.x86_64.rpm",
          "python-lxml-debugsource-5.1.0-4.oe2403.x86_64.rpm",
          "python-lxml-help-5.1.0-4.oe2403.x86_64.rpm",
          "python3-lxml-5.1.0-4.oe2403.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS",
        "name": "python-lxml",
        "purl": "pkg:rpm/openEuler/python-lxml\u0026distro=openEuler-24.03-LTS"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.1.0-4.oe2403"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "\\\r\n\r\nSecurity Fix(es):\n\nlxml is a library for processing XML and HTML in the Python language. Prior to 6.1.0, using either of the two parsers in the default configuration (with resolve_entities=True) allows untrusted XML input to read local files. Setting the resolve_entities option explicitly to resolve_entities=\u0026apos;internal\u0026apos; or resolve_entities=False disables the local file access. This vulnerability is fixed in 6.1.0.(CVE-2026-41066)",
  "id": "OESA-2026-2008",
  "modified": "2026-08-06T11:11:00Z",
  "published": "2026-04-25T11:11:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2008"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41066"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "python-lxml security update",
  "upstream": [
    "CVE-2026-41066"
  ]
}

CVE-2026-41066 (GCVE-0-2026-41066)

Vulnerability from cvelistv5 – Published: 2026-04-24 16:45 – Updated: 2026-04-24 18:04

Title

lxml: Default configuration of iterparse() and ETCompatXMLParser() allows XXE to local files

Summary

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-24 18:03 UTC

CWE

CWE-611 - Improper Restriction of XML External Entity Reference

Assigner

GitHub_M mitre root Scorecard

References

2 references

URL	Tags
https://github.com/lxml/lxml/security/advisories/…	x_refsource_CONFIRM
https://bugs.launchpad.net/lxml/+bug/2146291	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
lxml	lxml	Affected: < 6.1.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-41066",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-24T18:03:40.722204Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-24T18:04:04.548Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "lxml",
          "vendor": "lxml",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 6.1.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "lxml is a library for processing XML and HTML in the Python language. Prior to 6.1.0, using either of the two parsers in the default configuration (with resolve_entities=True) allows untrusted XML input to read local files. Setting the resolve_entities option explicitly to resolve_entities=\u0027internal\u0027 or resolve_entities=False disables the local file access. This vulnerability is fixed in 6.1.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-611",
              "description": "CWE-611: Improper Restriction of XML External Entity Reference",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-24T16:45:19.617Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/lxml/lxml/security/advisories/GHSA-vfmq-68hx-4jfw",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/lxml/lxml/security/advisories/GHSA-vfmq-68hx-4jfw"
        },
        {
          "name": "https://bugs.launchpad.net/lxml/+bug/2146291",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://bugs.launchpad.net/lxml/+bug/2146291"
        }
      ],
      "source": {
        "advisory": "GHSA-vfmq-68hx-4jfw",
        "discovery": "UNKNOWN"
      },
      "title": "lxml: Default configuration of iterparse() and ETCompatXMLParser() allows XXE to local files"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-41066",
    "datePublished": "2026-04-24T16:45:19.617Z",
    "dateReserved": "2026-04-16T16:43:03.174Z",
    "dateUpdated": "2026-04-24T18:04:04.548Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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OESA-2026-2008 (CVE-2026-41066)

CVE-2026-41066 (GCVE-0-2026-41066)

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Sightings

Nomenclature

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