CVE-2026-42795

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

• https://cna.erlef.org/cves/CVE-2026-42795.html 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
• https://github.com/gleam-lang/gleam/commit/6435a5528b9ae0449e2f32be579641ec485f6866 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
• https://github.com/gleam-lang/gleam/security/advisories/GHSA-qhh5-fg4c-8gqc 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
• https://github.com/gleam-lang/gleam/security/advisories/GHSA-qhh5-fg4c-8gqc 134c704f-9b21-4f2e-91b3-4a467353bcc0
• https://osv.dev/vulnerability/EEF-CVE-2026-42795 6b3ad84c-e1a6-4bf7-a703-f496b71e49db

The full cvelistV5 record. Download as CVE-2026-42795.json.

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              "content": {
                "id": "CVE-2026-42795",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-02T15:04:06.195456Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-02T15:04:35.767Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/gleam-lang/gleam/security/advisories/GHSA-qhh5-fg4c-8gqc"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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          ],
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          "modules": [
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          ],
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          "packageURL": "pkg:sid/gleam.run/gleam",
          "product": "Gleam",
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            "compiler-cli/src/publish.rs"
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              "status": "affected",
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              "versionType": "semver"
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              "versionType": "git"
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          "collectionURL": "https://ghcr.io",
          "cpes": [
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          "defaultStatus": "unaffected",
          "modules": [
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          "packageName": "gleam-lang/gleam",
          "packageURL": "pkg:oci/gleam?repository_url=ghcr.io/gleam-lang",
          "product": "Gleam",
          "programFiles": [
            "compiler-cli/src/fs.rs",
            "compiler-cli/src/publish.rs"
          ],
          "programRoutines": [
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            },
            {
              "name": "compiler_cli::fs::native_files"
            },
            {
              "name": "compiler_cli::fs::private_files"
            },
            {
              "name": "compiler_cli::publish::project_files"
            },
            {
              "name": "compiler_cli::publish::add_path_to_tar"
            }
          ],
          "vendor": "Gleam",
          "versions": [
            {
              "lessThan": "v1.17.0-elixir",
              "status": "affected",
              "version": "v0.10.0-rc1-elixir",
              "versionType": "other"
            },
            {
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              "status": "affected",
              "version": "v0.10.0-rc1-erlang",
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              "status": "affected",
              "version": "v0.10.0-rc1-node",
              "versionType": "other"
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              "status": "affected",
              "version": "v0.10.0-rc1-node-slim",
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              "versionType": "other"
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              "status": "affected",
              "version": "v0.10.0-rc1-erlang-slim",
              "versionType": "other"
            },
            {
              "lessThan": "v1.17.0-erlang-alpine",
              "status": "affected",
              "version": "v0.10.0-rc1-erlang-alpine",
              "versionType": "other"
            },
            {
              "lessThan": "v1.17.0-elixir-alpine",
              "status": "affected",
              "version": "v0.10.0-rc1-elixir-alpine",
              "versionType": "other"
            },
            {
              "lessThan": "v1.17.0-node-alpine",
              "status": "affected",
              "version": "v0.10.0-rc1-node-alpine",
              "versionType": "other"
            },
            {
              "lessThan": "v1.17.0-scratch",
              "status": "affected",
              "version": "v0.10.0-rc1-scratch",
              "versionType": "other"
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      ],
      "cpeApplicability": [
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              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:gleam-lang:gleam:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "1.17.0",
                  "versionStartIncluding": "0.10.0-rc1",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
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      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Aly (spect3r1)"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Abdelrahman Ahmed Aboelkasem (0x2face)"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Louis Pilfold"
        },
        {
          "lang": "en",
          "type": "analyst",
          "value": "Jonatan M\u00e4nnchen / EEF"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "<p>Symlink following vulnerability in Gleam's Hex package export allows files outside the project root to be embedded in the generated package tarball.</p><p>The file collection helpers (<tt>gleam_files</tt>, <tt>native_files</tt>, <tt>private_files</tt>) in <tt>compiler-cli/src/fs.rs</tt> use <tt>follow_links(true)</tt> when walking publishable directories such as <tt>src/</tt> and <tt>priv/</tt>. The collected paths are added to the package archive via <tt>add_path_to_tar</tt> in <tt>compiler-cli/src/publish.rs</tt> without verifying that the resolved target remains within the project root. A symlink placed under a publishable directory will cause <tt>gleam export hex-tarball</tt> or <tt>gleam publish</tt> to embed the contents of the symlink target into the generated Hex package.</p><p>An attacker with write access to the project repository can place a symlink in <tt>src/</tt> or <tt>priv/</tt> pointing to an arbitrary file. When a maintainer or CI pipeline runs <tt>gleam publish</tt> or <tt>gleam export hex-tarball</tt>, local files readable by the publisher (such as secrets, tokens, or SSH keys) are silently embedded into the published package artifact.</p><p>This issue affects Gleam from 0.10.0-rc1 until 1.17.0.</p>"
            }
          ],
          "value": "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."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-132",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-132 Symlink Attack"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 5.1,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "ACTIVE",
            "vectorString": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "NONE"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-59",
              "description": "CWE-59 Improper Link Resolution Before File Access ('Link Following')",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-02T19:14:25.176Z",
        "orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "shortName": "EEF"
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      "references": [
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          "tags": [
            "vendor-advisory",
            "related"
          ],
          "url": "https://github.com/gleam-lang/gleam/security/advisories/GHSA-qhh5-fg4c-8gqc"
        },
        {
          "tags": [
            "related"
          ],
          "url": "https://cna.erlef.org/cves/CVE-2026-42795.html"
        },
        {
          "tags": [
            "related"
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          "url": "https://osv.dev/vulnerability/EEF-CVE-2026-42795"
        },
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          "tags": [
            "patch"
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          "url": "https://github.com/gleam-lang/gleam/commit/6435a5528b9ae0449e2f32be579641ec485f6866"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Symlink Following in Hex Package Export Allows Embedding Files Outside Project Root",
      "workarounds": [
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          "lang": "en",
          "supportingMedia": [
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              "value": "<ul><li>Avoid running <tt>gleam publish</tt> or <tt>gleam export hex-tarball</tt> on untrusted projects</li><li>Review the contents of <tt>src/</tt> and <tt>priv/</tt> for unexpected symlinks before publishing</li><li>Run publishing commands in a restricted or isolated environment (e.g. containers)</li></ul>"
            }
          ],
          "value": "* Avoid running gleam publish or gleam export hex-tarball on untrusted projects\n* Review the contents of src/ and priv/ for unexpected symlinks before publishing\n* Run publishing commands in a restricted or isolated environment (e.g. containers)"
        }
      ],
      "x_generator": {
        "engine": "cvelib 1.8.0"
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  "cveMetadata": {
    "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
    "assignerShortName": "EEF",
    "cveId": "CVE-2026-42795",
    "datePublished": "2026-06-02T13:41:39.527Z",
    "dateReserved": "2026-04-29T18:06:33.251Z",
    "dateUpdated": "2026-06-02T19:14:25.176Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}