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vuln-cve/data/2026/23xxx/CVE-2026-23527.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-23527",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-01-13T18:22:43.981Z",
"datePublished": "2026-01-15T19:24:20.514Z",
"dateUpdated": "2026-04-13T16:48:19.873Z"
},
"containers": {
"cna": {
"title": "h3 v1 has Request Smuggling (TE.TE) issue",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-444",
"lang": "en",
"description": "CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 8.9,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L",
"version": "3.1"
}
}
],
"references": [
{
"name": "https://github.com/h3js/h3/security/advisories/GHSA-mp2g-9vg9-f4cg",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/h3js/h3/security/advisories/GHSA-mp2g-9vg9-f4cg"
},
{
"name": "https://github.com/h3js/h3/commit/618ccf4f37b8b6148bea7f36040471af45bfb097",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/h3js/h3/commit/618ccf4f37b8b6148bea7f36040471af45bfb097"
},
{
"name": "https://github.com/h3js/h3/releases/tag/v1.15.5",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/h3js/h3/releases/tag/v1.15.5"
},
{
"name": "https://simonkoeck.com/writeups/h3-transfer-encoding-request-smuggling",
"tags": [
"x_refsource_MISC"
],
"url": "https://simonkoeck.com/writeups/h3-transfer-encoding-request-smuggling"
}
],
"affected": [
{
"vendor": "h3js",
"product": "h3",
"versions": [
{
"version": "< 1.15.5",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-04-13T16:48:19.873Z"
},
"descriptions": [
{
"lang": "en",
"value": "H3 is a minimal H(TTP) framework built for high performance and portability. Prior to 1.15.5, there is a critical HTTP Request Smuggling vulnerability. readRawBody is doing a strict case-sensitive check for the Transfer-Encoding header. It explicitly looks for \"chunked\", but per the RFC, this header should be case-insensitive. This vulnerability is fixed in 1.15.5."
}
],
"source": {
"advisory": "GHSA-mp2g-9vg9-f4cg",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-01-15T19:59:57.020909Z",
"id": "CVE-2026-23527",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-01-15T20:00:06.302Z"
}
}
]
}
}