Vulnerability-Lookup

GHSA-JRC7-96C5-Q579

Vulnerability from github – Published: 2026-09-08 20:50 – Updated: 2026-09-08 20:50

Summary

MapLibre GL JS: XSS Sanitizer Bypass in DOM.sanitize() via Live NamedNodeMap Removal Skip

Details

Impact

DOM.sanitize() in src/util/dom.ts iterated elem.attributes (a live NamedNodeMap) while calling elem.removeAttribute() in the same loop. Removing an attribute shifts subsequent attributes down by one index, causing the iterator to skip the adjacent attribute.

An attacker can provide an HTML payload with consecutive dangerous attributes (such as <details open onload="1" ontoggle="...">). The first attribute is stripped while the second survives and executes upon insertion into innerHTML via the attribution control without requiring user interaction (zero-click XSS).

Applications rendering untrusted/third-party style attribution strings or user-supplied custom attributions are impacted.

Patches

The issue has been resolved by creating a static snapshot of attributes using Array.from(elem.attributes) before iteration. Please upgrade to maplibre-gl version 6.4.1 (or latest).

Workarounds

Sanitizing the attribute field of a source before passing it down to maplibre

Severity

10.0 (Critical)


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

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JSON

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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 6.4.0"
      },
      "package": {
        "ecosystem": "npm",
        "name": "maplibre-gl"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.4.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-85061"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-08T20:50:47Z",
    "nvd_published_at": "2026-09-03T21:17:23Z",
    "severity": "CRITICAL"
  },
  "details": "### Impact\n`DOM.sanitize()` in `src/util/dom.ts` iterated `elem.attributes` (a live `NamedNodeMap`) while calling `elem.removeAttribute()` in the same loop. Removing an attribute shifts subsequent attributes down by one index, causing the iterator to skip the adjacent attribute.\n\nAn attacker can provide an HTML payload with consecutive dangerous attributes (such as `\u003cdetails open onload=\"1\" ontoggle=\"...\"\u003e`). The first attribute is stripped while the second survives and executes upon insertion into `innerHTML` via the attribution control without requiring user interaction (zero-click XSS).\n\nApplications rendering untrusted/third-party style attribution strings or user-supplied custom attributions are impacted.\n\n### Patches\nThe issue has been resolved by creating a static snapshot of attributes using `Array.from(elem.attributes)` before iteration. Please upgrade to `maplibre-gl` version **6.4.1** (or latest).\n\n### Workarounds\nSanitizing the attribute field of a source before passing it down to maplibre",
  "id": "GHSA-jrc7-96c5-q579",
  "modified": "2026-09-08T20:50:47Z",
  "published": "2026-09-08T20:50:47Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/maplibre/maplibre-gl-js/security/advisories/GHSA-jrc7-96c5-q579"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-85061"
    },
    {
      "type": "WEB",
      "url": "https://github.com/maplibre/maplibre-gl-js/pull/8189"
    },
    {
      "type": "WEB",
      "url": "https://github.com/maplibre/maplibre-gl-js/commit/1da69f3cd913a39fa948708e01478663bf48bc27"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/maplibre/maplibre-gl-js"
    },
    {
      "type": "WEB",
      "url": "https://github.com/maplibre/maplibre-gl-js/releases/tag/v6.4.1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "MapLibre GL JS: XSS Sanitizer Bypass in DOM.sanitize() via Live NamedNodeMap Removal Skip"
}

CVE-2026-85061 (GCVE-0-2026-85061)

Vulnerability from cvelistv5 – Published: 2026-09-03 20:18 – Updated: 2026-09-04 18:37

Title

MapLibre GL JS: XSS Sanitizer Bypass in DOM.sanitize() via Live NamedNodeMap Removal Skip

Summary

MapLibre GL JS is an interactive vector tile map library for web browsers. Prior to 6.4.1, DOM.sanitize() in src/util/dom.ts iterates elem.attributes as a live NamedNodeMap while removeAttributes() removes attributes from the same collection, shifting indexes and skipping an adjacent dangerous attribute. An attacker who controls untrusted third-party style attribution strings or user-supplied custom attributions can supply consecutive dangerous attributes, causing an attribute such as onload or ontoggle to survive sanitization and execute when the attribution control inserts the content into innerHTML. A victim must render the affected map content for the script to execute. This issue is fixed in version 6.4.1.

Severity

10 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-04 18:36 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/maplibre/maplibre-gl-js/securi…	x_refsource_CONFIRM
https://github.com/maplibre/maplibre-gl-js/pull/8189	x_refsource_MISC
https://github.com/maplibre/maplibre-gl-js/commit…	x_refsource_MISC
https://github.com/maplibre/maplibre-gl-js/releas…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
maplibre	maplibre-gl-js	Affected: < 6.4.1

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-85061",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-04T18:36:59.472100Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
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        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-04T18:37:12.250Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "maplibre-gl-js",
          "vendor": "maplibre",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 6.4.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "MapLibre GL JS is an interactive vector tile map library for web browsers. Prior to 6.4.1, DOM.sanitize() in src/util/dom.ts iterates elem.attributes as a live NamedNodeMap while removeAttributes() removes attributes from the same collection, shifting indexes and skipping an adjacent dangerous attribute. An attacker who controls untrusted third-party style attribution strings or user-supplied custom attributions can supply consecutive dangerous attributes, causing an attribute such as onload or ontoggle to survive sanitization and execute when the attribution control inserts the content into innerHTML. A victim must render the affected map content for the script to execute. This issue is fixed in version 6.4.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 10,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/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"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-03T20:18:50.854Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/maplibre/maplibre-gl-js/security/advisories/GHSA-jrc7-96c5-q579",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/maplibre/maplibre-gl-js/security/advisories/GHSA-jrc7-96c5-q579"
        },
        {
          "name": "https://github.com/maplibre/maplibre-gl-js/pull/8189",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/maplibre/maplibre-gl-js/pull/8189"
        },
        {
          "name": "https://github.com/maplibre/maplibre-gl-js/commit/1da69f3cd913a39fa948708e01478663bf48bc27",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/maplibre/maplibre-gl-js/commit/1da69f3cd913a39fa948708e01478663bf48bc27"
        },
        {
          "name": "https://github.com/maplibre/maplibre-gl-js/releases/tag/v6.4.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/maplibre/maplibre-gl-js/releases/tag/v6.4.1"
        }
      ],
      "source": {
        "advisory": "GHSA-jrc7-96c5-q579",
        "discovery": "UNKNOWN"
      },
      "title": "MapLibre GL JS: XSS Sanitizer Bypass in DOM.sanitize() via Live NamedNodeMap Removal Skip"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-85061",
    "datePublished": "2026-09-03T20:18:50.854Z",
    "dateReserved": "2026-09-02T21:21:01.774Z",
    "dateUpdated": "2026-09-04T18:37:12.250Z",
    "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.