CVE-2026-86334 (GCVE-0-2026-86334)

Vulnerability from cvelistv5 – Published: 2026-09-28 13:21 – Updated: 2026-09-28 17:56
VLAI
Title
CLI Path Traversal via Content-Disposition in LXD Image Export/Copy
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.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-28 17:55 UTC
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
canonical CNA under the mitre root
CNA scorecard B 82/100 over 59 records in the last 180 days details
Impacted products
Vendor Product Version CPE status
Canonical LXD Affected: 4.0.2 , < 4.0.14 (semver)
Affected: 5.0.0 , < 5.0.10 (semver)
Affected: 5.21.0 , < 5.21.8 (semver)
Affected: 6.0 , < 6.10 (semver)
guessed Create a notification for this product.
Date Public
2026-09-25 03:00
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-86334",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-28T17:55:41.286474Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-28T17:56:11.126Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/canonical/lxd/security/advisories/GHSA-g4cm-f533-78hq"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "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"
            }
          ]
        }
      ],
      "datePublic": "2026-09-25T03:00:00.000Z",
      "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."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-126",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-126 Path Traversal"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "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"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-22",
              "description": "CWE-22 Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-28T13:21:15.612Z",
        "orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
        "shortName": "canonical"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory",
            "issue-tracking"
          ],
          "url": "https://github.com/canonical/lxd/security/advisories/GHSA-g4cm-f533-78hq"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/canonical/lxd/pull/18977"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/canonical/lxd/pull/18976"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/canonical/lxd/pull/18974"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/canonical/lxd/pull/18975"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/canonical/lxd/pull/18940"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to LXD versions 4.0.14, 5.0.10, 5.21.8, 6.10 or later."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "CLI Path Traversal via Content-Disposition in LXD Image Export/Copy"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
    "assignerShortName": "canonical",
    "cveId": "CVE-2026-86334",
    "datePublished": "2026-09-28T13:21:15.612Z",
    "dateReserved": "2026-09-07T08:01:22.941Z",
    "dateUpdated": "2026-09-28T17:56:11.126Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-86334",
      "date": "2026-11-01",
      "epss": "0.00331",
      "percentile": "0.26243"
    },
    "nvd": {
      "cve": {
        "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"
          }
        ]
      }
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-86334",
                    "options": [
                      {
                        "Exploitation": "poc"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-09-28T17:55:41.286474Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-09-28T17:56:03.588Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "references": [
              {
                "tags": [
                  "exploit"
                ],
                "url": "https://github.com/canonical/lxd/security/advisories/GHSA-g4cm-f533-78hq"
              }
            ],
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "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"
                }
              ]
            }
          ],
          "datePublic": "2026-09-25T03:00:00.000Z",
          "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."
            }
          ],
          "impacts": [
            {
              "capecId": "CAPEC-126",
              "descriptions": [
                {
                  "lang": "en",
                  "value": "CAPEC-126 Path Traversal"
                }
              ]
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "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"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-22",
                  "description": "CWE-22 Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-09-28T13:21:15.612Z",
            "orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
            "shortName": "canonical"
          },
          "references": [
            {
              "tags": [
                "vendor-advisory",
                "issue-tracking"
              ],
              "url": "https://github.com/canonical/lxd/security/advisories/GHSA-g4cm-f533-78hq"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/canonical/lxd/pull/18977"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/canonical/lxd/pull/18976"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/canonical/lxd/pull/18974"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/canonical/lxd/pull/18975"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/canonical/lxd/pull/18940"
            }
          ],
          "solutions": [
            {
              "lang": "en",
              "value": "Upgrade to LXD versions 4.0.14, 5.0.10, 5.21.8, 6.10 or later."
            }
          ],
          "source": {
            "discovery": "UNKNOWN"
          },
          "title": "CLI Path Traversal via Content-Disposition in LXD Image Export/Copy"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
        "assignerShortName": "canonical",
        "cveId": "CVE-2026-86334",
        "datePublished": "2026-09-28T13:21:15.612Z",
        "dateReserved": "2026-09-07T08:01:22.941Z",
        "dateUpdated": "2026-09-28T17:56:11.126Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
Events included in the timeline

Loading timeline…


    Loading…

    Loading…

    Loading…

    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.