Git source checkout from a bundle file could lead to command injection

{
  "id": "794dd7cf1ce090c708fbe6a17816644eb7f52e302e0d01833345f9c2cd2d5013",
  "url": "https://osv.dev/vulnerability/CVE-2026-15793",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Git source checkout from a bundle file could lead to command injection",
    "summary": "BuildKit custom frontends or clients using the raw low-level API can set git.checkoutbundle=true when checking out Git sources. If the Git source is malicious, this could lead to a crafted command invocation on the host.",
    "evidence": "osv:CVE-2026-15793",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-15793",
      "aliases": [
        "CVE-2026-15793",
        "GHSA-hw3h-2gp9-cxpv"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/moby/buildkit",
              "type": "GIT",
              "events": [
                {
                  "introduced": "dd2170e156c9633da1b2d1a58a6188e3f7d36fa4"
                },
                {
                  "fixed": "e42e1bfd389af7203238cce77b1f7dad447285e9"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0.30.0"
                      },
                      {
                        "last_affected": "0.31.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "cpe": "cpe:2.3:a:mobyproject:buildkit:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.30.0"
                      },
                      {
                        "fixed": "0.31.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-15793.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.161758236Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/15xxx/CVE-2026-15793.json",
        "https://github.com/moby/buildkit/security/advisories/GHSA-hw3h-2gp9-cxpv",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-15793"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-88"
        ],
        "cna_assigner": "Docker",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/15xxx/CVE-2026-15793.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-15793",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 489705,
  "published_at": "2026-07-21T16:10:21.79+00:00"
}