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CVE-2026-93566

Full vulnerability record from the local CVENow database.

Description

A flaw was found in Netty. A remote attacker could exploit this by sending a specially crafted HTTP request that includes control characters within the chunk-size line. This bypasses the intended strict validation, allowing the attacker to inject arbitrary HTTP requests. This vulnerability can lead to HTTP request smuggling, potentially resulting in information disclosure or other unauthorized actions.

Severity
MEDIUM
CVSS score
6.5 (v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
Published
2026-09-18 15:17:20.290000
Last modified
2026-11-06 18:18:25.757000
View original CVE JSON
{
  "id": "CVE-2026-93566",
  "sourceIdentifier": "[email protected]",
  "published": "2026-09-18T15:17:20.290",
  "lastModified": "2026-11-06T18:18:25.757",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in Netty. A remote attacker could exploit this by sending a specially crafted HTTP request that includes control characters within the chunk-size line. This bypasses the intended strict validation, allowing the attacker to inject arbitrary HTTP requests. This vulnerability can lead to HTTP request smuggling, potentially resulting in information disclosure or other unauthorized actions."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
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          "defaultStatus": "unaffected",
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "packageName": "netty-codec-http",
          "cpes": [
            "cpe:/a:redhat:debezium:3.6"
          ]
        },
        {
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          "packageName": "rhbk/keycloak-operator-bundle",
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          ],
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              "versionType": "rpm",
              "status": "unaffected"
            }
          ]
        },
        {
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            }
          ]
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            }
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        },
        {
          "vendor": "Red Hat",
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        {
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          "packageName": "netty-codec-http",
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          "product": "Red Hat AMQ Clients",
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          "packageName": "netty-codec-http",
          "cpes": [
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          "product": "Red Hat build of Apache Camel 4 for Quarkus 3",
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          "cpes": [
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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"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 2.5
      }
    ],
    "ssvcV203": [
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        "ssvcData": {
          "timestamp": "2026-09-22T14:28:28.241291Z",
          "id": "CVE-2026-93566",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "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]"
    },
    {
      "url": "https://access.redhat.com/errata/RHSA-2026:83612",
      "source": "[email protected]"
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    {
      "url": "https://access.redhat.com/errata/RHSA-2026:95759",
      "source": "[email protected]"
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    {
      "url": "https://access.redhat.com/errata/RHSA-2026:95760",
      "source": "[email protected]"
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    {
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      "source": "[email protected]"
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      "url": "https://access.redhat.com/errata/RHSA-2026:95762",
      "source": "[email protected]"
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      "source": "[email protected]"
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    {
      "url": "https://access.redhat.com/security/cve/CVE-2026-93566",
      "source": "[email protected]"
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2536954",
      "source": "[email protected]"
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  ]
}