Authenticated RCE via unsanitized compression_algorithm

{
  "id": "44337a189cde78afdebd6beb7a998485e33304f0b5522a371e82d77d29435603",
  "url": "https://osv.dev/vulnerability/CVE-2026-28384",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Authenticated RCE via unsanitized compression_algorithm",
    "summary": "An improper sanitization of the compression_algorithm parameter in Canonical LXD allows an authenticated, unprivileged user to execute commands as the LXD daemon on the LXD server via API calls to the image and backup endpoints. This issue affected LXD from 4.12 through 6.6 and was fixed in the snap versions 5.0.6-e49d9f4 (channel 5.0/stable), 5.21.4-1374f39 (channel 5.21/stable), and 6.7-1f11451 (channel 6.0 stable). The channel 4.0/stable is not affected as it contains version 4.0.10.",
    "evidence": "osv:CVE-2026-28384",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-28384",
      "aliases": [
        "CVE-2026-28384",
        "GHSA-4rmf-rcp8-2r9g"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/canonical/lxd",
              "type": "GIT",
              "events": [
                {
                  "introduced": "538ac3df036e4a8c0197d0f52d125be1b51879d0"
                },
                {
                  "fixed": "c1066285c21011f330214caf4e21ed6f507b5fbf"
                },
                {
                  "introduced": "761d134ceabd306f57acfb0ca51f59b03751a5b0"
                },
                {
                  "fixed": "0494f5d47e41af69a8374568c0cb8b3eefd72a6a"
                },
                {
                  "introduced": "0"
                },
                {
                  "fixed": "736f34afb267a68f1f324979848db20ae30fe9d1"
                },
                {
                  "fixed": "043696a13171ace7dd4c2b32d34ce039ab629052"
                },
                {
                  "fixed": "7046979645c2ce1b63b2f9e60ddf6cbc4c4b78f9"
                },
                {
                  "fixed": "b7b411caf5c4971bfe2386c72128f44d7e2aaf4f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.12"
                      },
                      {
                        "fixed": "5.0.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "5.21.0"
                      },
                      {
                        "fixed": "5.21.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "6.0"
                      },
                      {
                        "fixed": "6.7"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "043696a13171ace7dd4c2b32d34ce039ab629052"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "7046979645c2ce1b63b2f9e60ddf6cbc4c4b78f9"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "b7b411caf5c4971bfe2386c72128f44d7e2aaf4f"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "4.12",
            "lxd-5.17",
            "lxd-5.16",
            "lxd-5.15",
            "lxd-5.14",
            "lxd-5.13",
            "lxd-5.12",
            "lxd-5.11",
            "lxd-5.0.2",
            "lxd-5.10",
            "lxd-5.9",
            "lxd-5.8",
            "lxd-5.7",
            "lxd-5.6",
            "lxd-5.5",
            "lxd-5.0.1",
            "lxd-5.4",
            "lxd-5.3",
            "lxd-5.2",
            "lxd-5.1",
            "lxd-5.0.0",
            "lxd-4.24",
            "lxd-4.23",
            "lxd-4.22",
            "lxd-4.21",
            "lxd-4.20",
            "lxd-4.19",
            "lxd-4.18",
            "lxd-4.17",
            "lxd-4.16",
            "lxd-4.15",
            "lxd-4.14",
            "lxd-4.13",
            "lxd-4.12"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-28384.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:52.497320339Z",
      "provider": "osv",
      "references": [
        "https://discourse.ubuntu.com/t/lxd-authenticated-remote-code-execution-fixes-available/78365",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28384.json",
        "https://github.com/canonical/lxd/security/advisories/GHSA-4rmf-rcp8-2r9g",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-28384",
        "https://github.com/canonical/lxd/commit/043696a13171ace7dd4c2b32d34ce039ab629052",
        "https://github.com/canonical/lxd/commit/7046979645c2ce1b63b2f9e60ddf6cbc4c4b78f9",
        "https://github.com/canonical/lxd/commit/b7b411caf5c4971bfe2386c72128f44d7e2aaf4f",
        "https://github.com/canonical/lxd"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-78"
        ],
        "cna_assigner": "canonical",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28384.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-28384",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 521166,
  "published_at": "2026-03-12T14:51:29.991+00:00"
}