CVE-2026-63297

{
  "id": "CVE-2026-63297",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-12T20:17:47.583",
  "lastModified": "2026-10-24T16:10:00.153",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An authorization bypass vulnerability in LXD due to a timing flaw during configuration merging allows an authenticated attacker to bypass target project restrictions during cross-project instance copies. When copying an instance to a target project, LXD performs restriction checks before configuration merging is complete, creating a time-of-check to time-of-use (TOCTOU) condition. An attacker can exploit this flaw to copy instances with disallowed high-privilege configurations into restricted projects, bypassing security controls."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de omisión de autorización en LXD debido a un fallo de temporización durante la fusión de configuración permite a un atacante autenticado omitir las restricciones del proyecto de destino durante las copias de instancias entre proyectos. Al copiar una instancia a un proyecto de destino, LXD realiza comprobaciones de restricción antes de que se complete la fusión de configuración, creyo una condición de tiempo de verificación a tiempo de uso (TOCTOU). Un atacante puede explotar este fallo para copiar instancias con configuraciones de alto privilegio no permitidas en proyectos restringidos, omitiendo los controles de seguridad."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Canonical",
          "product": "LXD",
          "defaultStatus": "unaffected",
          "packageName": "LXD",
          "platforms": [
            "Linux"
          ],
          "repo": "https://github.com/canonical/lxd",
          "versions": [
            {
              "version": "5.0.0",
              "lessThan": "5.0.8",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "5.21.0",
              "lessThan": "5.21.6",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
          "baseScore": 9.9,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 6.0
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-13T14:28:52.383092Z",
          "id": "CVE-2026-63297",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-367"
        },
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ]
    }
  ],
  "configurations": [
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      "nodes": [
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          "operator": "OR",
          "negate": false,
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  "references": [
    {
      "url": "https://github.com/canonical/lxd/security/advisories/GHSA-v989-qw7w-xvg4",
      "source": "[email protected]",
      "tags": [
        "Vendor Advisory",
        "Exploit",
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      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
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}