Vulnerability-Lookup

GHSA-6VFC-QV3F-VR6C

Vulnerability from github – Published: 2022-01-12 22:20 – Updated: 2022-01-19 18:25

Summary

Uncontrolled Resource Consumption in markdown-it

Details

Impact

Special patterns with length > 50K chars can slow down parser significantly.

const md = require('markdown-it')();

md.render(`x ${' '.repeat(150000)} x  \nx`);

Patches

Upgrade to v12.3.2+

Workarounds

No.

References

Fix + test sample: https://github.com/markdown-it/markdown-it/commit/ffc49ab46b5b751cd2be0aabb146f2ef84986101

Severity

5.3 (Medium)


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

Show details on source website

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "markdown-it"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "12.3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2022-21670"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1333",
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-01-10T21:50:05Z",
    "nvd_published_at": "2022-01-10T21:15:00Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nSpecial patterns with length \u003e 50K chars can slow down parser significantly.\n\n```js\nconst md = require(\u0027markdown-it\u0027)();\n\nmd.render(`x ${\u0027 \u0027.repeat(150000)} x  \\nx`);\n```\n\n\n### Patches\n\nUpgrade to v12.3.2+\n\n### Workarounds\n\nNo.\n\n### References\n\nFix + test sample: https://github.com/markdown-it/markdown-it/commit/ffc49ab46b5b751cd2be0aabb146f2ef84986101\n",
  "id": "GHSA-6vfc-qv3f-vr6c",
  "modified": "2022-01-19T18:25:52Z",
  "published": "2022-01-12T22:20:22Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/markdown-it/markdown-it/security/advisories/GHSA-6vfc-qv3f-vr6c"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-21670"
    },
    {
      "type": "WEB",
      "url": "https://github.com/markdown-it/markdown-it/commit/ffc49ab46b5b751cd2be0aabb146f2ef84986101"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/markdown-it/markdown-it"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Uncontrolled Resource Consumption in markdown-it"
}

CVE-2022-21670 (GCVE-0-2022-21670)

Vulnerability from cvelistv5 – Published: 2022-01-10 20:40 – Updated: 2025-04-22 18:33

Title

Uncontrolled Resource Consumption in markdown-it

Summary

markdown-it is a Markdown parser. Prior to version 1.3.2, special patterns with length greater than 50 thousand characterss could slow down the parser significantly. Users should upgrade to version 12.3.2 to receive a patch. There are no known workarounds aside from upgrading.

Severity

5.3 (Medium)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-04-22 15:42 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7806 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/markdown-it/markdown-it/securi…	x_refsource_CONFIRM
https://github.com/markdown-it/markdown-it/commit…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
markdown-it	markdown-it	Affected: < 12.3.2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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        "providerMetadata": {
          "dateUpdated": "2024-08-03T02:46:39.537Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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          {
            "tags": [
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              "x_transferred"
            ],
            "url": "https://github.com/markdown-it/markdown-it/security/advisories/GHSA-6vfc-qv3f-vr6c"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/markdown-it/markdown-it/commit/ffc49ab46b5b751cd2be0aabb146f2ef84986101"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2022-21670",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-04-22T15:42:27.797317Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-04-22T18:33:46.200Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "markdown-it",
          "vendor": "markdown-it",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 12.3.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-400",
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              "lang": "en",
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      "providerMetadata": {
        "dateUpdated": "2022-01-10T20:40:10.000Z",
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      },
      "references": [
        {
          "tags": [
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          "url": "https://github.com/markdown-it/markdown-it/security/advisories/GHSA-6vfc-qv3f-vr6c"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/markdown-it/markdown-it/commit/ffc49ab46b5b751cd2be0aabb146f2ef84986101"
        }
      ],
      "source": {
        "advisory": "GHSA-6vfc-qv3f-vr6c",
        "discovery": "UNKNOWN"
      },
      "title": "Uncontrolled Resource Consumption in markdown-it",
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        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "markdown-it",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "\u003c 12.3.2"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "markdown-it"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
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            }
          ]
        },
        "impact": {
          "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.3,
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        "problemtype": {
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        "references": {
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            {
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    "dateReserved": "2021-11-16T00:00:00.000Z",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

Vulnerability timeline

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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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GHSA-6VFC-QV3F-VR6C

Impact

Patches

Workarounds

References

CVE-2022-21670 (GCVE-0-2022-21670)

Tags

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