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vuln-cve/data/2026/16xxx/CVE-2026-16729.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-16729",
"assignerOrgId": "ce714d77-add3-4f53-aff5-83d477b104bb",
"state": "PUBLISHED",
"assignerShortName": "openjs",
"dateReserved": "2026-07-23T05:44:24.720Z",
"datePublished": "2026-07-29T16:45:57.001Z",
"dateUpdated": "2026-07-29T18:08:16.149Z"
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"descriptions": [
{
"lang": "en",
"value": "undici's setCookie function does not fully sanitize cookie attributes. In undici before 6.28.0, from 7.0.0 up to before 7.29.0, and from 8.0.0 up to before 8.9.0, a domain value is not checked for semicolons and entries in the unparsed array are not sanitized, so attacker-influenced input can inject additional cookie attributes. For example, a domain value containing a semicolon can append attributes such as SameSite, and an unparsed entry can inject attributes such as HttpOnly, without the caller setting them. Applications that pass user-controlled input to these fields, such as multi-tenant or reverse-proxy servers that scope session cookies to a tenant-supplied domain, can have SameSite CSRF protections bypassed, or the Secure, HttpOnly, and SameSite attributes forced, stripped, or overridden. The issue is fixed in undici 6.28.0, 7.29.0, and 8.9.0.",
"supportingMedia": [
{
"type": "text/html",
"base64": false,
"value": "undici's setCookie function does not fully sanitize cookie attributes. In undici before 6.28.0, from 7.0.0 up to before 7.29.0, and from 8.0.0 up to before 8.9.0, a domain value is not checked for semicolons and entries in the unparsed array are not sanitized, so attacker-influenced input can inject additional cookie attributes. For example, a domain value containing a semicolon can append attributes such as SameSite, and an unparsed entry can inject attributes such as HttpOnly, without the caller setting them. Applications that pass user-controlled input to these fields, such as multi-tenant or reverse-proxy servers that scope session cookies to a tenant-supplied domain, can have SameSite CSRF protections bypassed, or the Secure, HttpOnly, and SameSite attributes forced, stripped, or overridden. The issue is fixed in undici 6.28.0, 7.29.0, and 8.9.0."
}
]
}
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{
"vendor": "undici",
"product": "undici",
"defaultStatus": "unaffected",
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"versionType": "semver",
"status": "affected",
"version": "0",
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"version": "7.29.0"
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"status": "affected",
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"versionType": "semver",
"status": "unaffected",
"version": "8.9.0"
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"packageURL": "pkg:npm/undici"
}
],
"references": [
{
"url": "https://github.com/nodejs/undici/security/advisories/GHSA-v3r7-h72x-cjcm"
},
{
"url": "https://cna.openjsf.org/security-advisories.html"
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "Zelys-DFKH"
},
{
"lang": "en",
"type": "remediation reviewer",
"value": "mcollina"
},
{
"lang": "en",
"type": "remediation reviewer",
"value": "UlisesGascon"
}
],
"title": "undici vulnerable to cookie attribute injection via unsanitized domain and unparsed setCookie fields",
"metrics": [
{
"format": "CVSS",
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
"baseScore": 4.8,
"baseSeverity": "MEDIUM"
},
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-74",
"lang": "en",
"description": "CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')",
"type": "CWE"
}
]
}
],
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"content": {
"timestamp": "2026-07-29T18:08:05.310961Z",
"id": "CVE-2026-16729",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
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}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-07-29T18:08:16.149Z"
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