« Volver al listado

CVE-2026-63296

Estado: AnalizadaCrítica (9.9)—

An authorization bypass vulnerability in LXD allows an authenticated attacker to bypass target project restrictions during instance migration. When migrating an instance to a target project, LXD accepts configuration overrides without validating the new configuration against the target project's enforced restrictions. An attacker can exploit this flaw to move instances with disallowed high-privilege configurations into restricted projects, bypassing security controls.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad de autorización en LXD (servicio remoto) que requiere autenticación previa (PR:L). Permite eludir restricciones de proyecto y escalada a configuraciones privilegiadas, otorgando acceso elevado.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Threat Intelligence ProgramApplication Isolation and SandboxingExploit ProtectionUpdate SoftwareVulnerability ScanningPrivileged Account Management

Tecnologías afectadas (1)

Canonical — LXD

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-63296",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-63296",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-08-13T14:25:15.629982Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security@ubuntu.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 9.9,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 6,
        "exploitabilityScore": 3.1
      }
    ]
  },
  "affected": [
    {
      "source": "security@ubuntu.com",
      "affectedData": [
        {
          "repo": "https://github.com/canonical/lxd",
          "vendor": "Canonical",
          "product": "LXD",
          "versions": [
            {
              "status": "affected",
              "version": "5.0.0",
              "lessThan": "5.0.8",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "5.21.0",
              "lessThan": "5.21.6",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.0",
              "lessThan": "6.10",
              "versionType": "semver"
            }
          ],
          "platforms": [
            "Linux"
          ],
          "packageName": "LXD",
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-08-12T20:17:47.437",
  "references": [
    {
      "url": "https://github.com/canonical/lxd/security/advisories/GHSA-gcr9-5q6r-w625",
      "tags": [
        "Vendor Advisory",
        "Exploit",
        "Mitigation"
      ],
      "source": "security@ubuntu.com"
    },
    {
      "url": "https://github.com/canonical/lxd/security/advisories/GHSA-gcr9-5q6r-w625",
      "tags": [
        "Vendor Advisory",
        "Exploit",
        "Mitigation"
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@ubuntu.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An authorization bypass vulnerability in LXD allows an authenticated attacker to bypass target project restrictions during instance migration. When migrating an instance to a target project, LXD accepts configuration overrides without validating the new configuration against the target project's enforced restrictions. An attacker can exploit this flaw to move instances with disallowed high-privilege configurations into restricted projects, bypassing security controls."
    }
  ],
  "lastModified": "2026-09-11T15:15:30.017",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "59D070D6-84D2-400E-8260-EA52E5C60D37",
              "versionEndExcluding": "5.0.8",
              "versionStartIncluding": "5.0.0"
            },
            {
              "criteria": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "575036D1-2B55-4043-B94A-1584E3F2DA37",
              "versionEndExcluding": "5.21.6",
              "versionStartIncluding": "5.1"
            },
            {
              "criteria": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "374F5622-1D8F-4EF9-97E6-736C8220623B",
              "versionEndExcluding": "6.10",
              "versionStartIncluding": "6.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security@ubuntu.com"
}