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)
Assigner
References
Impacted products
Credits
Matteo Collina
Ulises Gascón
{
"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": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-1528\",\"sourceIdentifier\":\"ce714d77-add3-4f53-aff5-83d477b104bb\",\"published\":\"2026-03-12T21:16:25.330\",\"lastModified\":\"2026-03-13T20:06:54.667\",\"vulnStatus\":\"Awaiting Analysis\",\"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\"}]}],\"references\":[{\"url\":\"https://cna.openjsf.org/security-advisories.html\",\"source\":\"ce714d77-add3-4f53-aff5-83d477b104bb\"},{\"url\":\"https://github.com/nodejs/undici/security/advisories/GHSA-f269-vfmq-vjvj\",\"source\":\"ce714d77-add3-4f53-aff5-83d477b104bb\"},{\"url\":\"https://hackerone.com/reports/3537648\",\"source\":\"ce714d77-add3-4f53-aff5-83d477b104bb\"}]}}",
"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"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
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.
Loading…
Loading…