Vulnerability-Lookup

GHSA-JG4P-G6XJ-4QMF

Vulnerability from github – Published: 2026-08-21 20:54 – Updated: 2026-08-21 20:54

Summary

Defuddle vulnerable to XSS via unescaped attribute interpolation in site extractors

Details

Summary

An Improper Neutralization of Input During Web Page Generation issue in the site extractor component allows an attacker-controlled attribute value to be injected into output HTML without escaping. An attacker who crafts a malicious HTML page or controls content on a matching domain can execute arbitrary scripts when a victim processes the page, resulting in Cross-Site Scripting (XSS). This affects defuddle through 0.19.0 and has been patched in version 0.19.1.

Impact

This vulnerability allows for Cross-Site Scripting (XSS) execution without needing to compromise external websites. Affected consumers include: - Obsidian Web Clipper, - web services serving the parsed output directly as HTML, and - any downstream application rendering the unsanitized HTML results

Patch

This issue has been patched in defuddle version 0.19.1. Users are encouraged to update to the latest release.

Severity

8.2 (High)


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

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JSON

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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.19.0"
      },
      "package": {
        "ecosystem": "npm",
        "name": "defuddle"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.19.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-61824"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-116",
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-21T20:54:56Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "## Summary\n\nAn Improper Neutralization of Input During Web Page Generation issue in the site extractor component allows an attacker-controlled attribute value to be injected into output HTML without escaping. An attacker who crafts a malicious HTML page or controls content on a matching domain can execute arbitrary scripts when a victim processes the page, resulting in Cross-Site Scripting (XSS).  This affects defuddle through 0.19.0 and has been patched in version 0.19.1.\n\n## Impact\n\nThis vulnerability allows for Cross-Site Scripting (XSS) execution without needing to compromise external websites. Affected consumers include:\n- Obsidian Web Clipper, \n- web services serving the parsed output directly as HTML, and \n- any downstream application rendering the unsanitized HTML results\n\n## Patch\nThis issue has been patched in defuddle version 0.19.1. Users are encouraged to update to the latest release.",
  "id": "GHSA-jg4p-g6xj-4qmf",
  "modified": "2026-08-21T20:54:56Z",
  "published": "2026-08-21T20:54:56Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/kepano/defuddle/security/advisories/GHSA-jg4p-g6xj-4qmf"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kepano/defuddle/pull/326"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kepano/defuddle/commit/baf2eaef61d334ef595b28c89e5c5e89e52daf7f"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/kepano/defuddle"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kepano/defuddle/releases/tag/0.19.1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Defuddle vulnerable to XSS via unescaped attribute interpolation in site extractors"
}

CVE-2026-61824 (GCVE-0-2026-61824)

Vulnerability from cvelistv5 – Published: 2026-08-21 20:12 – Updated: 2026-08-24 19:48

Title

Defuddle: XSS via unescaped attribute interpolation in site extractors

Summary

Defuddle cleans up HTML pages. Prior to 0.19.1, site extractors interpolate page-derived image alt and src values, og:image values, and video descriptions into HTML strings without context-appropriate escaping, and buildExtractorResponse() returns this contentHtml without the main pipeline's DOM-based sanitization. The affected paths include src/extractors/x-article.ts, src/extractors/substack.ts, and src/extractors/youtube.ts. A malicious page or attacker-controlled content on a matching domain can inject event-handler attributes or javascript URLs that execute when a victim or downstream application renders the extracted HTML. This issue is fixed in version 0.19.1.

Severity

8.2 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-24 19:48 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-116 - Improper Encoding or Escaping of Output

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/kepano/defuddle/security/advis…	x_refsource_CONFIRM
https://github.com/kepano/defuddle/pull/326	x_refsource_MISC
https://github.com/kepano/defuddle/commit/baf2eae…	x_refsource_MISC
https://github.com/kepano/defuddle/releases/tag/0.19.1	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
kepano	defuddle	Affected: < 0.19.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-61824",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-24T19:48:42.055279Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-24T19:48:53.974Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "defuddle",
          "vendor": "kepano",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.19.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Defuddle cleans up HTML pages. Prior to 0.19.1, site extractors interpolate page-derived image alt and src values, og:image values, and video descriptions into HTML strings without context-appropriate escaping, and buildExtractorResponse() returns this contentHtml without the main pipeline\u0027s DOM-based sanitization. The affected paths include src/extractors/x-article.ts, src/extractors/substack.ts, and src/extractors/youtube.ts. A malicious page or attacker-controlled content on a matching domain can inject event-handler attributes or javascript URLs that execute when a victim or downstream application renders the extracted HTML. This issue is fixed in version 0.19.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-116",
              "description": "CWE-116: Improper Encoding or Escaping of Output",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-21T20:12:53.225Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/kepano/defuddle/security/advisories/GHSA-jg4p-g6xj-4qmf",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/kepano/defuddle/security/advisories/GHSA-jg4p-g6xj-4qmf"
        },
        {
          "name": "https://github.com/kepano/defuddle/pull/326",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/kepano/defuddle/pull/326"
        },
        {
          "name": "https://github.com/kepano/defuddle/commit/baf2eaef61d334ef595b28c89e5c5e89e52daf7f",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/kepano/defuddle/commit/baf2eaef61d334ef595b28c89e5c5e89e52daf7f"
        },
        {
          "name": "https://github.com/kepano/defuddle/releases/tag/0.19.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/kepano/defuddle/releases/tag/0.19.1"
        }
      ],
      "source": {
        "advisory": "GHSA-jg4p-g6xj-4qmf",
        "discovery": "UNKNOWN"
      },
      "title": "Defuddle:  XSS via unescaped attribute interpolation in site extractors"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-61824",
    "datePublished": "2026-08-21T20:12:53.225Z",
    "dateReserved": "2026-07-10T20:17:57.993Z",
    "dateUpdated": "2026-08-24T19:48:53.974Z",
    "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.
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.

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.

Action not permitted

GHSA-JG4P-G6XJ-4QMF

Summary

Impact

Patch

CVE-2026-61824 (GCVE-0-2026-61824)

Tags

Sightings

Nomenclature