{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0.10.0-rc1"
              },
              {
                "fixed": "1.17.0"
              },
              {
                "introduced": "v0.10.0-rc1-elixir"
              },
              {
                "fixed": "v1.17.0-elixir"
              },
              {
                "introduced": "v0.10.0-rc1-erlang"
              },
              {
                "fixed": "v1.17.0-erlang"
              },
              {
                "introduced": "v0.10.0-rc1-node"
              },
              {
                "fixed": "v1.17.0-node"
              },
              {
                "introduced": "v0.10.0-rc1-node-slim"
              },
              {
                "fixed": "v1.17.0-node-slim"
              },
              {
                "introduced": "v0.10.0-rc1-elixir-slim"
              },
              {
                "fixed": "v1.17.0-elixir-slim"
              },
              {
                "introduced": "v0.10.0-rc1-erlang-slim"
              },
              {
                "fixed": "v1.17.0-erlang-slim"
              },
              {
                "introduced": "v0.10.0-rc1-erlang-alpine"
              },
              {
                "fixed": "v1.17.0-erlang-alpine"
              },
              {
                "introduced": "v0.10.0-rc1-elixir-alpine"
              },
              {
                "fixed": "v1.17.0-elixir-alpine"
              },
              {
                "introduced": "v0.10.0-rc1-node-alpine"
              },
              {
                "fixed": "v1.17.0-node-alpine"
              },
              {
                "introduced": "v0.10.0-rc1-scratch"
              },
              {
                "fixed": "v1.17.0-scratch"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "b257d55b33ff75515f9ed7d2a670e73c4aaaef91"
            },
            {
              "fixed": "6435a5528b9ae0449e2f32be579641ec485f6866"
            }
          ],
          "repo": "https://github.com/gleam-lang/gleam",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-qhh5-fg4c-8gqc"
  ],
  "database_specific": {
    "cna_assigner": "EEF",
    "cwe_ids": [
      "CWE-59"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42795.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "c82a2d83bd0c06cafdc196820deb3f89a9b3ff7c"
          },
          {
            "fixed": "6435a5528b9ae0449e2f32be579641ec485f6866"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Symlink following vulnerability in Gleam's Hex package export allows files outside the project root to be embedded in the generated package tarball.\n\nThe file collection helpers (gleam_files, native_files, private_files) in compiler-cli/src/fs.rs use follow_links(true) when walking publishable directories such as src/ and priv/. The collected paths are added to the package archive via add_path_to_tar in compiler-cli/src/publish.rs without verifying that the resolved target remains within the project root. A symlink placed under a publishable directory will cause gleam export hex-tarball or gleam publish to embed the contents of the symlink target into the generated Hex package.\n\nAn attacker with write access to the project repository can place a symlink in src/ or priv/ pointing to an arbitrary file. When a maintainer or CI pipeline runs gleam publish or gleam export hex-tarball, local files readable by the publisher (such as secrets, tokens, or SSH keys) are silently embedded into the published package artifact.\n\nThis issue affects Gleam from 0.10.0-rc1 until 1.17.0.",
  "id": "CVE-2026-42795",
  "modified": "2026-09-09T03:30:21.822714807Z",
  "published": "2026-06-02T13:41:39.527Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://cna.erlef.org/cves/CVE-2026-42795.html"
    },
    {
      "type": "WEB",
      "url": "https://ghcr.io"
    },
    {
      "type": "WEB",
      "url": "https://github.com"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-42795"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42795.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/gleam-lang/gleam/security/advisories/GHSA-qhh5-fg4c-8gqc"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42795"
    },
    {
      "type": "FIX",
      "url": "https://github.com/gleam-lang/gleam/commit/6435a5528b9ae0449e2f32be579641ec485f6866"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/gleam-lang/gleam"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Symlink Following in Hex Package Export Allows Embedding Files Outside Project Root"
}