FKIE_CVE-2026-86334

Vulnerability from fkie_nvd - Published: 2026-09-28 14:17 - Updated: 2026-09-28 18:17
Severity
4.2 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L
Summary
Path traversal in the CLI client image export and copy functionality in Canonical LXD from 4.0.2 before 4.0.14, 5.0.10, 5.21.8, and 6.10 on all platforms allows a remote malicious or machine-in-the-middle image server to overwrite arbitrary local files and execute code on the client system via a crafted Content-Disposition header filename parameter during unified image export or copy operations into a local directory target.
References
security@ubuntu.comhttps://github.com/canonical/lxd/pull/18940
security@ubuntu.comhttps://github.com/canonical/lxd/pull/18974
security@ubuntu.comhttps://github.com/canonical/lxd/pull/18975
security@ubuntu.comhttps://github.com/canonical/lxd/pull/18976
security@ubuntu.comhttps://github.com/canonical/lxd/pull/18977
security@ubuntu.comhttps://github.com/canonical/lxd/security/advisories/GHSA-g4cm-f533-78hq
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/canonical/lxd/security/advisories/GHSA-g4cm-f533-78hq
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "packageName": "LXD",
          "platforms": [
            "Linux"
          ],
          "product": "LXD",
          "repo": "https://github.com/canonical/lxd",
          "vendor": "Canonical",
          "versions": [
            {
              "lessThan": "4.0.14",
              "status": "affected",
              "version": "4.0.2",
              "versionType": "semver"
            },
            {
              "lessThan": "5.0.10",
              "status": "affected",
              "version": "5.0.0",
              "versionType": "semver"
            },
            {
              "lessThan": "5.21.8",
              "status": "affected",
              "version": "5.21.0",
              "versionType": "semver"
            },
            {
              "lessThan": "6.10",
              "status": "affected",
              "version": "6.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@ubuntu.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Path traversal in the CLI client image export and copy functionality in Canonical LXD from 4.0.2 before 4.0.14, 5.0.10, 5.21.8, and 6.10 on all platforms allows a remote malicious or machine-in-the-middle image server to overwrite arbitrary local files and execute code on the client system via a crafted Content-Disposition header filename parameter during unified image export or copy operations into a local directory target."
    }
  ],
  "id": "CVE-2026-86334",
  "lastModified": "2026-09-28T18:17:25.683",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 4.2,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 2.5,
        "source": "security@ubuntu.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-86334",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-28T17:55:41.286474Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-28T14:17:20.590",
  "references": [
    {
      "source": "security@ubuntu.com",
      "url": "https://github.com/canonical/lxd/pull/18940"
    },
    {
      "source": "security@ubuntu.com",
      "url": "https://github.com/canonical/lxd/pull/18974"
    },
    {
      "source": "security@ubuntu.com",
      "url": "https://github.com/canonical/lxd/pull/18975"
    },
    {
      "source": "security@ubuntu.com",
      "url": "https://github.com/canonical/lxd/pull/18976"
    },
    {
      "source": "security@ubuntu.com",
      "url": "https://github.com/canonical/lxd/pull/18977"
    },
    {
      "source": "security@ubuntu.com",
      "url": "https://github.com/canonical/lxd/security/advisories/GHSA-g4cm-f533-78hq"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/canonical/lxd/security/advisories/GHSA-g4cm-f533-78hq"
    }
  ],
  "sourceIdentifier": "security@ubuntu.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ],
      "source": "security@ubuntu.com",
      "type": "Secondary"
    }
  ]
}



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