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vuln-cve/data/2026/26xxx/CVE-2026-26962.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-26962",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-02-16T22:20:28.612Z",
"datePublished": "2026-04-02T17:10:17.091Z",
"dateUpdated": "2026-04-03T18:13:06.632Z"
},
"containers": {
"cna": {
"title": "Rack: Header injection in multipart requests",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-93",
"lang": "en",
"description": "CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection')",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 4.8,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
"version": "3.1"
}
}
],
"references": [
{
"name": "https://github.com/rack/rack/security/advisories/GHSA-rx22-g9mx-qrhv",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/rack/rack/security/advisories/GHSA-rx22-g9mx-qrhv"
}
],
"affected": [
{
"vendor": "rack",
"product": "rack",
"versions": [
{
"version": ">= 3.2.0, < 3.2.6",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-04-02T17:10:17.091Z"
},
"descriptions": [
{
"lang": "en",
"value": "Rack is a modular Ruby web server interface. From version 3.2.0 to before version 3.2.6, Rack::Multipart::Parser unfolds folded multipart part headers incorrectly. When a multipart header contains an obs-fold sequence, Rack preserves the embedded CRLF in parsed parameter values such as filename or name instead of removing the folded line break during unfolding. As a result, applications that later reuse those parsed values in HTTP response headers may be vulnerable to downstream header injection or response splitting. This issue has been patched in version 3.2.6."
}
],
"source": {
"advisory": "GHSA-rx22-g9mx-qrhv",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-04-02T18:31:17.511210Z",
"id": "CVE-2026-26962",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"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": "2026-04-03T18:13:06.632Z"
}
}
]
}
}