Vulnerability-Lookup

CVE-2026-71436 (GCVE-0-2026-71436)

Vulnerability from cvelistv5 – Published: 2026-08-06 19:49 – Updated: 2026-08-07 16:17

Title

Mermaid XY Charts are vulnerable to an infinite loop DoS

Summary

Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. From version 10.6.0 until 10.9.8 and 11.16.1, Mermaid XY Charts are vulnerable to an infinite loop denial of service in the setXAxisRangeData function when configuring an X-Axis with invalid parameters. Because each loop iteration appends an element to an array, this generally causes a RangeError to appear after a few seconds, but it may instead cause the page or JavaScript process to crash from memory exhaustion, depending on the environment. This issue is fixed in versions 10.9.8 and 11.16.1.

Severity

5.3 (Medium)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
CWE-1325 - Improperly Controlled Sequential Memory Allocation

Assigner

GitHub_M

References

6 references

URL	Tags
https://github.com/mermaid-js/mermaid/security/ad…	x_refsource_CONFIRM
https://github.com/mermaid-js/mermaid/pull/8022	x_refsource_MISC
https://github.com/mermaid-js/mermaid/commit/630a…	x_refsource_MISC
https://github.com/mermaid-js/mermaid/commit/ef60…	x_refsource_MISC
https://github.com/mermaid-js/mermaid/releases/ta…	x_refsource_MISC
https://github.com/mermaid-js/mermaid/releases/ta…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
mermaid-js	mermaid	Affected: >= 10.6.0, < 10.9.8 Affected: >= 11.0.0-alpha.1, < 11.16.1

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JSON

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GHSA-2V8P-3F2J-5MP7

Vulnerability from github – Published: 2026-08-06 19:49 – Updated: 2026-08-06 19:49

Summary

Mermaid XY Charts are vulnerable to an infinite loop DoS

Details

Impact

Mermaid XY Charts are vulnerable to an infinite loop DoS attack in the setXAxisRangeData(), when configuring an X-Axis with invalid parameters.

As each loop appends an element to an array, this would generally only cause an RangeError: Invalid array length to appear after a few seconds, but may cause the page/JavaScript process to crash due to memory exhaustion, depending on the environment.

Proof-of-concept

xychart
  x-axis 1 --> 1
  line [1, 2]

Patches

This has been patched in https://github.com/mermaid-js/mermaid/commit/630aa7e5dd417e1f56bff2a1ce8df2c5ad08d289 and released in Mermaid v11.16.1.

A backport has been made for the v10 branch in ef60adc837d9d5107af21285f01e83dea309bd0a and was released in Mermaid v10.9.8

Workarounds

There are no known workarounds. Please update to the latest version or apply the patch.

References

https://github.com/mermaid-js/mermaid/commit/630aa7e5dd417e1f56bff2a1ce8df2c5ad08d289
https://github.com/mermaid-js/mermaid/releases/tag/mermaid%4011.16.1
https://github.com/mermaid-js/mermaid/commit/ef60adc837d9d5107af21285f01e83dea309bd0a
https://github.com/mermaid-js/mermaid/releases/tag/v10.9.8

Severity

5.3 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "mermaid"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "10.6.0"
            },
            {
              "fixed": "10.9.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
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    },
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        "ecosystem": "npm",
        "name": "mermaid"
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          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-71436"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1325",
      "CWE-835"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-06T19:49:48Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nMermaid XY Charts are vulnerable to an infinite loop DoS attack in the `setXAxisRangeData()`, when configuring an X-Axis with invalid parameters.\n\nAs each loop appends an element to an array, this would generally only cause an `RangeError: Invalid array length` to appear after a few seconds, but may cause the page/JavaScript process to crash due to memory exhaustion, depending on the environment.\n\n#### Proof-of-concept\n\n```txt\nxychart\n  x-axis 1 --\u003e 1\n  line [1, 2]\n```\n\n### Patches\n\nThis has been patched in https://github.com/mermaid-js/mermaid/commit/630aa7e5dd417e1f56bff2a1ce8df2c5ad08d289 and released in [Mermaid v11.16.1](https://github.com/mermaid-js/mermaid/releases/tag/mermaid%4011.16.1).\n\nA backport has been made for the v10 branch in ef60adc837d9d5107af21285f01e83dea309bd0a and was released in [Mermaid v10.9.8](https://github.com/mermaid-js/mermaid/releases/tag/v10.9.8)\n\n### Workarounds\n\nThere are no known workarounds. Please update to the latest version or apply the patch.\n\n### References\n\n- https://github.com/mermaid-js/mermaid/commit/630aa7e5dd417e1f56bff2a1ce8df2c5ad08d289\n- https://github.com/mermaid-js/mermaid/releases/tag/mermaid%4011.16.1\n- https://github.com/mermaid-js/mermaid/commit/ef60adc837d9d5107af21285f01e83dea309bd0a\n- https://github.com/mermaid-js/mermaid/releases/tag/v10.9.8",
  "id": "GHSA-2v8p-3f2j-5mp7",
  "modified": "2026-08-06T19:49:48Z",
  "published": "2026-08-06T19:49:48Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/mermaid-js/mermaid/security/advisories/GHSA-2v8p-3f2j-5mp7"
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    {
      "type": "WEB",
      "url": "https://github.com/mermaid-js/mermaid/pull/8022"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mermaid-js/mermaid/commit/630aa7e5dd417e1f56bff2a1ce8df2c5ad08d289"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mermaid-js/mermaid/commit/ef60adc837d9d5107af21285f01e83dea309bd0a"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/mermaid-js/mermaid"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mermaid-js/mermaid/releases/tag/mermaid@11.16.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mermaid-js/mermaid/releases/tag/v10.9.8"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Mermaid XY Charts are vulnerable to an infinite loop DoS"
}

ubuntu-cve-2026-71436

Vulnerability from osv_ubuntu

Published

2026-08-07 00:00

Modified

2026-08-07 00:00

Summary

Details

Severity

5.3 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-71436	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-71436	REPORT
	https://github.com/mermaid-js/mermaid/security/ad…	REPORT
	https://github.com/mermaid-js/mermaid/commit/630a…	REPORT
	https://github.com/mermaid-js/mermaid/commit/ef60…	REPORT
	https://github.com/mermaid-js/mermaid/pull/8022	REPORT
	https://github.com/mermaid-js/mermaid/releases/ta…	REPORT
	https://github.com/mermaid-js/mermaid/releases/ta…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "node-mermaid",
            "binary_version": "8.13.8+~cs10.4.16-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "node-mermaid",
        "purl": "pkg:deb/ubuntu/node-mermaid@8.13.8+~cs10.4.16-1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.7.0+ds+~cs27.17.17-3",
        "8.13.3+ds+~cs26.13.21-1",
        "8.13.3+ds+~cs26.13.21-2",
        "8.13.8+~cs10.4.16-1"
      ]
    }
  ],
  "aliases": [],
  "details": "Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. From version 10.6.0 until 10.9.8 and 11.16.1, Mermaid XY Charts are vulnerable to an infinite loop denial of service in the setXAxisRangeData function when configuring an X-Axis with invalid parameters. Because each loop iteration appends an element to an array, this generally causes a RangeError to appear after a few seconds, but it may instead cause the page or JavaScript process to crash from memory exhaustion, depending on the environment. This issue is fixed in versions 10.9.8 and 11.16.1.",
  "id": "UBUNTU-CVE-2026-71436",
  "modified": "2026-08-07T00:00:00Z",
  "published": "2026-08-07T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-71436"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-71436"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/mermaid-js/mermaid/security/advisories/GHSA-2v8p-3f2j-5mp7"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/mermaid-js/mermaid/commit/630aa7e5dd417e1f56bff2a1ce8df2c5ad08d289"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/mermaid-js/mermaid/commit/ef60adc837d9d5107af21285f01e83dea309bd0a"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/mermaid-js/mermaid/pull/8022"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/mermaid-js/mermaid/releases/tag/mermaid@11.16.1"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/mermaid-js/mermaid/releases/tag/v10.9.8"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-71436"
  ]
}

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.

Action not permitted

CVE-2026-71436 (GCVE-0-2026-71436)

GHSA-2V8P-3F2J-5MP7

Impact

Proof-of-concept

Patches

Workarounds

References

ubuntu-cve-2026-71436

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature