CVE-2026-5052
Full vulnerability record from the local CVENow database.
Description
Vault’s PKI engine’s ACME validation did not reject local targets when issuing http-01 and tls-alpn-01 challenges. This may lead to these requests being sent to local network targets, potentially leading to information disclosure. Fixed in Vault Community Edition 2.0.0 and Vault Enterprise 2.0.0, 1.21.5, 1.20.10, and 1.19.16.
Severity
HIGH
CVSS score
8.6
(v3.1)
Vulnerability status
Analyzed
Source identifier
Published
2026-04-17 04:16:12.567000
Last modified
2026-10-26 21:10:00.170000
View original CVE JSON
{
"id": "CVE-2026-5052",
"sourceIdentifier": "[email protected]",
"published": "2026-04-17T04:16:12.567",
"lastModified": "2026-10-26T21:10:00.170",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Vault’s PKI engine’s ACME validation did not reject local targets when issuing http-01 and tls-alpn-01 challenges. This may lead to these requests being sent to local network targets, potentially leading to information disclosure. Fixed in Vault Community Edition 2.0.0 and Vault Enterprise 2.0.0, 1.21.5, 1.20.10, and 1.19.16."
},
{
"lang": "es",
"value": "La validación ACME del motor PKI de Vault no rechazó objetivos locales al emitir desafíos http-01 y tls-alpn-01. Esto puede llevar a que estas solicitudes sean enviadas a objetivos de red locales, lo que podría resultar en revelación de información. Corregido en Vault Community Edition 2.0.0 y Vault Enterprise 2.0.0, 1.21.5, 1.20.10 y 1.19.16."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "HashiCorp",
"product": "Vault",
"defaultStatus": "unaffected",
"platforms": [
"64 bit",
"32 bit",
"x86",
"ARM",
"MacOS",
"Windows",
"Linux"
],
"repo": "https://github.com/hashicorp/vault",
"versions": [
{
"version": "1.15.0",
"lessThan": "2.0.0",
"versionType": "semver",
"status": "affected"
}
]
},
{
"vendor": "HashiCorp",
"product": "Vault Enterprise",
"defaultStatus": "unaffected",
"platforms": [
"64 bit",
"32 bit",
"x86",
"ARM",
"MacOS",
"Windows",
"Linux"
],
"repo": "https://github.com/hashicorp/vault",
"versions": [
{
"version": "1.15.0",
"lessThan": "2.0.0",
"versionType": "semver",
"status": "affected",
"changes": [
{
"at": "1.19.16",
"status": "unaffected"
},
{
"at": "1.20.10",
"status": "unaffected"
},
{
"at": "1.21.5",
"status": "unaffected"
}
]
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"availabilityImpact": "NONE"
},
"exploitabilityScore": 3.9,
"impactScore": 1.4
},
{
"source": "[email protected]",
"type": "Primary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
"baseScore": 8.6,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "CHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"availabilityImpact": "NONE"
},
"exploitabilityScore": 3.9,
"impactScore": 4.0
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-04-17T13:19:57.168697Z",
"id": "CVE-2026-5052",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-918"
}
]
}
],
"configurations": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:a:hashicorp:vault:*:*:*:*:enterprise:*:*:*",
"versionStartIncluding": "1.14.0",
"versionEndExcluding": "1.19.16",
"matchCriteriaId": "5EF70F5F-D939-4808-9F03-57745D1333B3"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:hashicorp:vault:*:*:*:*:-:*:*:*",
"versionStartIncluding": "1.14.0",
"versionEndExcluding": "2.0.0",
"matchCriteriaId": "64F0763E-552C-4882-A66F-D7CE8D13B7CD"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:hashicorp:vault:*:*:*:*:enterprise:*:*:*",
"versionStartIncluding": "1.20.0",
"versionEndExcluding": "1.20.10",
"matchCriteriaId": "E2135CCF-F6D8-41AC-8D0C-F763F63974B4"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:hashicorp:vault:*:*:*:*:enterprise:*:*:*",
"versionStartIncluding": "1.21.0",
"versionEndExcluding": "1.21.5",
"matchCriteriaId": "C8097BD2-0B19-4BA7-930E-93A5A89EC4AF"
}
]
}
]
}
],
"references": [
{
"url": "https://discuss.hashicorp.com/t/hcsec-2026-06-vault-vulnerable-to-server-side-request-forgery-in-acme-challenge-validation-via-attacker-controlled-dns/77343",
"source": "[email protected]",
"tags": [
"Vendor Advisory"
]
}
]
}