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CVE-2026-0865

Estado: AplazadaMedia (5.9)—

User-controlled header names and values containing newlines can allow injecting HTTP headers.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-0865",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-0865",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-01-21T15:40:22.223517Z"
        }
      }
    ],
    "cvssMetricV40": [
      {
        "type": "Secondary",
        "source": "cna@python.org",
        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
          "baseScore": 5.9,
          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "exploitMaturity": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "privilegesRequired": "HIGH",
          "subIntegrityImpact": "NONE",
          "vulnIntegrityImpact": "HIGH",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "vulnAvailabilityImpact": "NONE",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "subConfidentialityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "confidentialityRequirement": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
        }
      }
    ]
  },
  "affected": [
    {
      "source": "cna@python.org",
      "affectedData": [
        {
          "vendor": "Python Software Foundation",
          "product": "CPython",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "3.10.20",
              "versionType": "python"
            },
            {
              "status": "affected",
              "version": "3.11.0",
              "lessThan": "3.11.15",
              "versionType": "python"
            },
            {
              "status": "affected",
              "version": "3.12.0",
              "lessThan": "3.12.13",
              "versionType": "python"
            },
            {
              "status": "affected",
              "version": "3.13.0",
              "lessThan": "3.13.12",
              "versionType": "python"
            },
            {
              "status": "affected",
              "version": "3.14.0",
              "lessThan": "3.14.3",
              "versionType": "python"
            },
            {
              "status": "affected",
              "version": "3.15.0a1",
              "lessThan": "3.15.0a6",
              "versionType": "python"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-01-20T22:15:52.800",
  "references": [
    {
      "url": "https://github.com/python/cpython/commit/22e4d55285cee52bc4dbe061324e5f30bd4dee58",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/23e3c0ae867cca0130e441e776c9955b9027c510",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/286e3ac39984fe85a17f4ab39c64d382137aae5f",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/2f840249550e082dc351743f474ba56da10478d2",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/4802b96a2cde58570c24c13ef3289490980961c5",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/66da7bf6fe7b81e3ecc9c0a25bd47d4616c8d1a6",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/83ecd18779f286d872f68bfce175651e407d9fff",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/8bb044d29310bb05d15086cdaa8bf64867d61a97",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/bfba660085767f8c2d582134e9d511a85eda04cf",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/c592227ffb48679af9845a45dbb0875d975bb219",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/e4846a93ac07a8ae9aa18203af0dd13d6e7a6995",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/commit/f7fceed79ca1bceae8dbe5ba5bc8928564da7211",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/issues/143916",
      "source": "cna@python.org"
    },
    {
      "url": "https://github.com/python/cpython/pull/143917",
      "source": "cna@python.org"
    },
    {
      "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/BJ6QPHNSHJTS3A7CFV6IBMCAP2DWRVNT/",
      "source": "cna@python.org"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "cna@python.org",
      "description": [
        {
          "lang": "en",
          "value": "CWE-74"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "User-controlled header names and values containing newlines can allow injecting HTTP headers."
    },
    {
      "lang": "es",
      "value": "Nombres y valores de encabezado controlados por el usuario que contienen saltos de línea pueden permitir la inyección de encabezados HTTP."
    }
  ],
  "lastModified": "2026-06-17T10:11:31.550",
  "sourceIdentifier": "cna@python.org"
}