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vuln-cve/data/2026/27xxx/CVE-2026-27700.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-27700",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-02-23T17:56:51.202Z",
"datePublished": "2026-02-25T15:01:44.681Z",
"dateUpdated": "2026-02-27T17:01:28.403Z"
},
"containers": {
"cna": {
"title": "Hono is Vulnerable to Authentication Bypass by IP Spoofing in AWS Lambda ALB conninfo",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-345",
"lang": "en",
"description": "CWE-345: Insufficient Verification of Data Authenticity",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-290",
"lang": "en",
"description": "CWE-290: Authentication Bypass by Spoofing",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
"version": "3.1"
}
}
],
"references": [
{
"name": "https://github.com/honojs/hono/security/advisories/GHSA-xh87-mx6m-69f3",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/honojs/hono/security/advisories/GHSA-xh87-mx6m-69f3"
},
{
"name": "https://github.com/honojs/hono/commit/41adbf56e252c04611f8972364ac0887ae07a4c7",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/honojs/hono/commit/41adbf56e252c04611f8972364ac0887ae07a4c7"
},
{
"name": "https://github.com/honojs/hono/releases/tag/v4.12.2",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/honojs/hono/releases/tag/v4.12.2"
}
],
"affected": [
{
"vendor": "honojs",
"product": "hono",
"versions": [
{
"version": ">= 4.12.0, < 4.12.2",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-02-25T15:01:44.681Z"
},
"descriptions": [
{
"lang": "en",
"value": "Hono is a Web application framework that provides support for any JavaScript runtime. In versions 4.12.0 and 4.12.1, when using the AWS Lambda adapter (`hono/aws-lambda`) behind an Application Load Balancer (ALB), the `getConnInfo()` function incorrectly selected the first value from the `X-Forwarded-For` header. Because AWS ALB appends the real client IP address to the end of the `X-Forwarded-For` header, the first value can be attacker-controlled. This could allow IP-based access control mechanisms (such as the `ipRestriction` middleware) to be bypassed. Version 4.12.2 patches the issue."
}
],
"source": {
"advisory": "GHSA-xh87-mx6m-69f3",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-02-27T17:01:17.956003Z",
"id": "CVE-2026-27700",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-02-27T17:01:28.403Z"
}
}
]
}
}