Insecure Preservation of SUID/SGID Bits during ZIP Extraction Leading to Potential Privilege Escalation

{
  "id": "7bbe0955100f445576b78722d8d078b62b5b61ab3eca662039b56e58480d01ab",
  "url": "https://osv.dev/vulnerability/RUSTSEC-2026-0367",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Insecure Preservation of SUID/SGID Bits during ZIP Extraction Leading to Potential Privilege Escalation",
    "summary": "The `zip` crate preserves privileged Unix permission bits (SUID, SGID, and sticky bits) from ZIP `external_attributes` during extraction, instead of masking them to safe permission bits. If a privileged process (for example, `root` in an installer, CI/CD pipeline, or container build) extracts an attacker-controlled ZIP archive using `ZipArchive::extract()` or the stream extraction API, files can be created as setuid-root or setgid. This behavior allows the creation of SUID/SGID files during extraction, which can lead to local privilege escalation depending on the execution environment. For further details see: https://github.com/zip-rs/zip2/security/advisories/GHSA-vv5m-jxxh-4627",
    "evidence": "osv:RUSTSEC-2026-0367",
    "products": [
      {
        "name": {
          "value": "zip",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "9.0.0",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "RUSTSEC-2026-0367",
      "aliases": [
        "GHSA-vv5m-jxxh-4627",
        "RUSTSEC-2026-0367"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "0.0.0-0"
                },
                {
                  "fixed": "9.0.0"
                }
              ]
            }
          ],
          "package": {
            "name": "zip",
            "purl": "pkg:cargo/zip",
            "ecosystem": "crates.io"
          },
          "database_specific": {
            "cvss": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
            "source": "https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2026-0367.json",
            "categories": [
              "privilege-escalation"
            ],
            "informational": null
          },
          "ecosystem_specific": {
            "affects": {
              "os": [],
              "arch": [],
              "functions": []
            },
            "affected_functions": null
          }
        }
      ],
      "modified": "2026-10-16T23:30:02.392172556Z",
      "provider": "osv",
      "references": [
        "https://crates.io/crates/zip",
        "https://rustsec.org/advisories/RUSTSEC-2026-0367.html"
      ],
      "provider_metadata": {
        "license": "CC0-1.0"
      }
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 349394,
  "published_at": "2026-10-09T12:00:00+00:00"
}