CVE-2026-93579
Full vulnerability record from the local CVENow database.
Description
A flaw was found in Netty's HTTP/2 stack. This vulnerability allows a remote attacker to inject prohibited characters, such as NUL, Line Feed, and Carriage Return, into HTTP/2 header field values due to insufficient validation. When these values cross an HTTP/2 to HTTP/1.1 translation boundary, they can be exploited for request smuggling, header injection, or response splitting. This could lead to unauthorized access, data manipulation, or other security bypasses.
Severity
MEDIUM
CVSS score
6.5
(v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
Published
2026-09-18 17:17:06.890000
Last modified
2026-11-04 15:17:57.020000
View original CVE JSON
{
"id": "CVE-2026-93579",
"sourceIdentifier": "[email protected]",
"published": "2026-09-18T17:17:06.890",
"lastModified": "2026-11-04T15:17:57.020",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in Netty's HTTP/2 stack. This vulnerability allows a remote attacker to inject prohibited characters, such as NUL, Line Feed, and Carriage Return, into HTTP/2 header field values due to insufficient validation. When these values cross an HTTP/2 to HTTP/1.1 translation boundary, they can be exploited for request smuggling, header injection, or response splitting. This could lead to unauthorized access, data manipulation, or other security bypasses."
}
],
"affected": [
{
"source": "[email protected]",
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"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:L/A:N",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"availabilityImpact": "NONE"
},
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"impactScore": 2.5
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-09-21T19:48:39.163858Z",
"id": "CVE-2026-93579",
"options": [
{
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},
{
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],
"role": "CISA Coordinator",
"version": "2.0.3"
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},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-1035"
}
]
}
],
"references": [
{
"url": "https://access.redhat.com/errata/RHSA-2026:69440",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:69470",
"source": "[email protected]"
},
{
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"source": "[email protected]"
},
{
"url": "https://access.redhat.com/errata/RHSA-2026:95221",
"source": "[email protected]"
},
{
"url": "https://access.redhat.com/security/cve/CVE-2026-93579",
"source": "[email protected]"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2536970",
"source": "[email protected]"
}
]
}