Vulnerability-Lookup

CVE-2020-26307 (GCVE-0-2020-26307)

Vulnerability from cvelistv5 – Published: 2024-10-26 20:26 – Updated: 2024-10-28 14:48

Title

GHSL-2020-301: Regular Expression Denial of Service (ReDoS) in HTML2Markdown

Summary

HTML2Markdown is a Javascript implementation for converting HTML to Markdown text. All available versions contain one or more regular expressions that are vulnerable to Regular Expression Denial of Service (ReDoS). As of time of publication, no known patches are available.

Severity

8.7 (High)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-1333 - Inefficient Regular Expression Complexity

Assigner

GitHub_M

References

2 references

URL	Tags
https://securitylab.github.com/advisories/GHSL-20…
https://github.com/kates/html2markdown/issues/13

Impacted products

2 products

Vendor	Product	Version
kates	html2markdown	Affected: 0 , ≤ 1.0.2 (custom)
kates	html2markdown	Affected: 0 , ≤ 1.0.2 (custom) cpe:2.3:a:kates:html2markdown::::::::

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2020-26307

Vulnerability from fkie_nvd - Published: 2024-10-26 21:15 - Updated: 2026-04-15 00:35

Severity

8.7 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/U:Green

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/kates/html2markdown/issues/13
	security-advisories@github.com	https://securitylab.github.com/advisories/GHSL-2020-301-redos-HTML2Markdown/

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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    }
  ],
  "id": "CVE-2020-26307",
  "lastModified": "2026-04-15T00:35:42.020",
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}

GHSA-QMPF-C66X-M579

Vulnerability from github – Published: 2024-10-26 21:30 – Updated: 2024-10-26 21:30

Details

Severity

8.7 (High)


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

Show details on source website

JSON

To clipboard

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  "aliases": [
    "CVE-2020-26307"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1333"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-10-26T21:15:13Z",
    "severity": "HIGH"
  },
  "details": "HTML2Markdown is a Javascript implementation for converting HTML to Markdown text. All available versions contain one or more regular expressions that are vulnerable to Regular Expression Denial of Service (ReDoS). As of time of publication, no known patches are available.",
  "id": "GHSA-qmpf-c66x-m579",
  "modified": "2024-10-26T21:30:46Z",
  "published": "2024-10-26T21:30:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-26307"
    },
    {
      "type": "WEB",
      "url": "https://github.com/kates/html2markdown/issues/13"
    },
    {
      "type": "ADVISORY",
      "url": "https://securitylab.github.com/advisories/GHSL-2020-301-redos-HTML2Markdown"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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:Green",
      "type": "CVSS_V4"
    }
  ]
}

GSD-2020-26307

Vulnerability from gsd - Updated: 2023-12-13 01:22

Details

** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided.

Aliases

CVE-2020-26307

Aliases

CVE-2020-26307

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2020-26307",
    "id": "GSD-2020-26307"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-26307"
      ],
      "id": "GSD-2020-26307",
      "modified": "2023-12-13T01:22:08.485702Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2020-26307",
        "STATE": "RESERVED"
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided."
          }
        ]
      }
    }
  }
}

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.

Action not permitted

CVE-2020-26307 (GCVE-0-2020-26307)

FKIE_CVE-2020-26307

GHSA-QMPF-C66X-M579

GSD-2020-26307

Tags

Sightings

Nomenclature