CVE-2026-1528 (GCVE-0-2026-1528)

Vulnerability from cvelistv5 – Published: 2026-03-12 20:21 – Updated: 2026-03-13 13:04
VLAI
Title
undici is vulnerable to Malicious WebSocket 64-bit length overflows undici parser and crashes the client
Summary
ImpactA server can reply with a WebSocket frame using the 64-bit length form and an extremely large length. undici's ByteParser overflows internal math, ends up in an invalid state, and throws a fatal TypeError that terminates the process. Patches Patched in the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-248 - Uncaught exception
  • CWE-1284 - Improper validation of specified quantity in input
Assigner
References
Impacted products
Vendor Product Version
undici undici Affected: >= 6.0.0 < 6.24.0; 7.0.0 < 7.24.0
Unaffected: 6.24.0: 7.24.0
Create a notification for this product.
Credits
Matteo Collina Ulises Gascón
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-1528",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-13T13:03:59.738320Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-13T13:04:57.048Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://github.com/nodejs/undici/",
          "defaultStatus": "unaffected",
          "packageName": "undici",
          "product": "undici",
          "repo": "https://github.com/nodejs/undici/",
          "vendor": "undici",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 6.0.0 \u003c 6.24.0; 7.0.0 \u003c 7.24.0"
            },
            {
              "status": "unaffected",
              "version": "6.24.0: 7.24.0"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "remediation reviewer",
          "value": "Matteo Collina"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Ulises Gasc\u00f3n"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003ch3\u003e\u003cspan\u003eImpact\u003c/span\u003e\u003c/h3\u003e\u003cp\u003eA server can reply with a WebSocket frame using the 64-bit length form and an extremely large length. undici\u0027s ByteParser overflows internal math, ends up in an invalid state, and throws a fatal TypeError that terminates the process.\u003cbr\u003e\u003cbr\u003e\u003cb\u003ePatches\u003cbr\u003e\u003c/b\u003e\u003cbr\u003ePatched in the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later.\u003cbr\u003e\u003c/p\u003e\u003cbr\u003e"
            }
          ],
          "value": "ImpactA server can reply with a WebSocket frame using the 64-bit length form and an extremely large length. undici\u0027s ByteParser overflows internal math, ends up in an invalid state, and throws a fatal TypeError that terminates the process.\n\nPatches\n\nPatched in the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "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:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-248",
              "description": "CWE-248 Uncaught exception",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-1284",
              "description": "CWE-1284 Improper validation of specified quantity in input",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-12T20:21:57.775Z",
        "orgId": "ce714d77-add3-4f53-aff5-83d477b104bb",
        "shortName": "openjs"
      },
      "references": [
        {
          "url": "https://github.com/nodejs/undici/security/advisories/GHSA-f269-vfmq-vjvj"
        },
        {
          "url": "https://hackerone.com/reports/3537648"
        },
        {
          "url": "https://cna.openjsf.org/security-advisories.html"
        }
      ],
      "source": {
        "advisory": "GHSA-f269-vfmq-vjvj",
        "discovery": "UNKNOWN"
      },
      "title": "undici is vulnerable to Malicious WebSocket 64-bit length overflows undici parser and crashes the client",
      "x_generator": {
        "engine": "Vulnogram 1.0.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "ce714d77-add3-4f53-aff5-83d477b104bb",
    "assignerShortName": "openjs",
    "cveId": "CVE-2026-1528",
    "datePublished": "2026-03-12T20:21:57.775Z",
    "dateReserved": "2026-01-28T12:05:10.024Z",
    "dateUpdated": "2026-03-13T13:04:57.048Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-1528",
      "date": "2026-05-26",
      "epss": "0.0012",
      "percentile": "0.30411"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-1528\",\"sourceIdentifier\":\"ce714d77-add3-4f53-aff5-83d477b104bb\",\"published\":\"2026-03-12T21:16:25.330\",\"lastModified\":\"2026-03-20T15:41:40.110\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"ImpactA server can reply with a WebSocket frame using the 64-bit length form and an extremely large length. undici\u0027s ByteParser overflows internal math, ends up in an invalid state, and throws a fatal TypeError that terminates the process.\\n\\nPatches\\n\\nPatched in the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later.\"},{\"lang\":\"es\",\"value\":\"Impacto\\nUn servidor puede responder con un marco WebSocket utilizando el formato de longitud de 64 bits y una longitud extremadamente grande. El ByteParser de undici desborda las operaciones matem\u00e1ticas internas, termina en un estado inv\u00e1lido y lanza un TypeError fatal que termina el proceso.\\n\\nParches\\n\\nParcheado en la versi\u00f3n v7.24.0 y v6.24.0 de undici. Los usuarios deben actualizar a esta versi\u00f3n o posterior.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"ce714d77-add3-4f53-aff5-83d477b104bb\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"ce714d77-add3-4f53-aff5-83d477b104bb\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-248\"},{\"lang\":\"en\",\"value\":\"CWE-1284\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:nodejs:undici:*:*:*:*:*:node.js:*:*\",\"versionEndExcluding\":\"6.24.0\",\"matchCriteriaId\":\"C08CE582-019D-4A06-910A-6010C2D6EF4F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:nodejs:undici:*:*:*:*:*:node.js:*:*\",\"versionStartIncluding\":\"7.0.0\",\"versionEndExcluding\":\"7.24.0\",\"matchCriteriaId\":\"F016E7D9-C45A-4DEF-9AD8-F0581AF5E509\"}]}]}],\"references\":[{\"url\":\"https://cna.openjsf.org/security-advisories.html\",\"source\":\"ce714d77-add3-4f53-aff5-83d477b104bb\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://github.com/nodejs/undici/security/advisories/GHSA-f269-vfmq-vjvj\",\"source\":\"ce714d77-add3-4f53-aff5-83d477b104bb\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://hackerone.com/reports/3537648\",\"source\":\"ce714d77-add3-4f53-aff5-83d477b104bb\",\"tags\":[\"Permissions Required\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-1528\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-03-13T13:03:59.738320Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-03-13T13:04:19.272Z\"}}], \"cna\": {\"title\": \"undici is vulnerable to Malicious WebSocket 64-bit length overflows undici parser and crashes the client\", \"source\": {\"advisory\": \"GHSA-f269-vfmq-vjvj\", \"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"remediation reviewer\", \"value\": \"Matteo Collina\"}, {\"lang\": \"en\", \"type\": \"remediation developer\", \"value\": \"Ulises Gasc\\u00f3n\"}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"repo\": \"https://github.com/nodejs/undici/\", \"vendor\": \"undici\", \"product\": \"undici\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003e= 6.0.0 \u003c 6.24.0; 7.0.0 \u003c 7.24.0\"}, {\"status\": \"unaffected\", \"version\": \"6.24.0: 7.24.0\"}], \"packageName\": \"undici\", \"collectionURL\": \"https://github.com/nodejs/undici/\", \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://github.com/nodejs/undici/security/advisories/GHSA-f269-vfmq-vjvj\"}, {\"url\": \"https://hackerone.com/reports/3537648\"}, {\"url\": \"https://cna.openjsf.org/security-advisories.html\"}], \"x_generator\": {\"engine\": \"Vulnogram 1.0.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"ImpactA server can reply with a WebSocket frame using the 64-bit length form and an extremely large length. undici\u0027s ByteParser overflows internal math, ends up in an invalid state, and throws a fatal TypeError that terminates the process.\\n\\nPatches\\n\\nPatched in the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003ch3\u003e\u003cspan\u003eImpact\u003c/span\u003e\u003c/h3\u003e\u003cp\u003eA server can reply with a WebSocket frame using the 64-bit length form and an extremely large length. undici\u0027s ByteParser overflows internal math, ends up in an invalid state, and throws a fatal TypeError that terminates the process.\u003cbr\u003e\u003cbr\u003e\u003cb\u003ePatches\u003cbr\u003e\u003c/b\u003e\u003cbr\u003ePatched in the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later.\u003cbr\u003e\u003c/p\u003e\u003cbr\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-248\", \"description\": \"CWE-248 Uncaught exception\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-1284\", \"description\": \"CWE-1284 Improper validation of specified quantity in input\"}]}], \"providerMetadata\": {\"orgId\": \"ce714d77-add3-4f53-aff5-83d477b104bb\", \"shortName\": \"openjs\", \"dateUpdated\": \"2026-03-12T20:21:57.775Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-1528\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-13T13:04:57.048Z\", \"dateReserved\": \"2026-01-28T12:05:10.024Z\", \"assignerOrgId\": \"ce714d77-add3-4f53-aff5-83d477b104bb\", \"datePublished\": \"2026-03-12T20:21:57.775Z\", \"assignerShortName\": \"openjs\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.