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CVE-2026-123318

Full vulnerability record from the local CVENow database.

Description

In JetBrains Ktor before 3.6.1 hTTP request smuggling was possible in the CIO engine

Severity

MEDIUM

CVSS score

4.8 (v3.1)

Vulnerability status

Received

Source identifier

[email protected]

Published

2026-11-06 11:17:11.317000

Last modified

2026-11-06 11:17:11.317000

View original CVE JSON

{
  "id": "CVE-2026-123318",
  "sourceIdentifier": "[email protected]",
  "published": "2026-11-06T11:17:11.317",
  "lastModified": "2026-11-06T11:17:11.317",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In JetBrains Ktor before 3.6.1 hTTP request smuggling was possible in the CIO engine"
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "JetBrains",
          "product": "Ktor",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "lessThan": "3.6.1",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
          "baseScore": 4.8,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 2.5
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-444"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://www.jetbrains.com/privacy-security/issues-fixed/",
      "source": "[email protected]"
    }
  ]
}