{"id":"CVE-2026-103061","revision":null,"records":[{"revision":"1a300cd8d1194b64ae8fa76c01e5888a","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-103061","aliases":[],"title":"Path traversal in Gleam via unvalidated package application names","description":"Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in gleam-lang gleam allows a malicious package publisher to delete a directory outside the project's build directory when a developer builds a project.\n\nA Hex package release's metadata carries an app field with the release's OTP application name. Gleam reads this field from the hex.pm release API when it downloads dependencies and uses it as the package's build directory name without validating it (hex_manifest_package in compiler-cli/src/dependencies.rs, ProjectPaths::build_directory_for_package). When a dependency fails to compile, Gleam deletes that directory with remove_dir_all. hex.pm didn't restrict the field to a directory name before 2026-10-12, so a publisher could set it to a value such as ../../../../target or an absolute path. When a project depends on such a release directly or transitively and the release fails to compile, gleam build, gleam check, gleam run, gleam test or gleam export deletes the directory the name resolves to. For a pure Gleam package no publisher code runs.\n\nThis issue affects gleam: from 0.32.4 before 1.19.2.","state":0,"publishedAt":"2026-10-12T18:23:41.507+00:00","modifiedAt":"2026-10-16T17:49:42.484+00:00","affected":[{"ecosystem":"Vendor product","name":"gleam","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"cpes\": [\n \"cpe:2.3:a:gleam-lang:gleam:*:*:*:*:*:*:*:*\"\n ],\n \"defaultStatus\": \"unaffected\",\n \"modules\": [\n \"gleam_cli::dependencies\",\n \"gleam_core::manifest\",\n \"gleam_core::paths\",\n \"gleam_core::build::project_compiler\",\n \"gleam_cli::fs\"\n ],\n \"packageName\": \"gleam\",\n \"packageURL\": \"pkg:software-id/gleam.run/gleam\",\n \"product\": \"Gleam\",\n \"programFiles\": [\n \"compiler-cli/src/dependencies.rs\",\n \"compiler-core/src/manifest.rs\",\n \"compiler-core/src/paths.rs\",\n \"compiler-core/src/build/project_compiler.rs\",\n \"compiler-cli/src/fs.rs\"\n ],\n \"programRoutines\": [\n {\n \"name\": \"gleam_cli::dependencies::hex_manifest_package\"\n },\n {\n \"name\": \"gleam_core::manifest::ManifestPackage::application_name\"\n },\n {\n \"name\": \"gleam_core::paths::ProjectPaths::build_directory_for_package\"\n },\n {\n \"name\": \"gleam_core::build::project_compiler::ProjectCompiler::load_cache_or_compile_package\"\n },\n {\n \"name\": \"gleam_cli::fs::delete_directory\"\n }\n ],\n \"vendor\": \"Gleam\",\n \"versions\": [\n {\n \"lessThan\": \"1.19.2\",\n \"status\": \"affected\",\n \"version\": \"0.32.4\",\n \"versionType\": \"semver\"\n }\n ]\n }"},{"ecosystem":"https://ghcr.io","name":"gleam-lang/gleam","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"collectionURL\": \"https://ghcr.io\",\n \"cpes\": [\n \"cpe:2.3:a:gleam-lang:gleam:*:*:*:*:*:*:*:*\"\n ],\n \"defaultStatus\": \"unaffected\",\n \"modules\": [\n \"gleam_cli::dependencies\",\n \"gleam_core::manifest\",\n \"gleam_core::paths\",\n \"gleam_core::build::project_compiler\",\n \"gleam_cli::fs\"\n ],\n \"packageName\": \"gleam-lang/gleam\",\n \"packageURL\": \"pkg:oci/gleam?repository_url=ghcr.io%2Fgleam-lang\",\n \"product\": \"Gleam\",\n \"programFiles\": [\n \"compiler-cli/src/dependencies.rs\",\n \"compiler-core/src/manifest.rs\",\n \"compiler-core/src/paths.rs\",\n \"compiler-core/src/build/project_compiler.rs\",\n \"compiler-cli/src/fs.rs\"\n ],\n \"programRoutines\": [\n {\n \"name\": \"gleam_cli::dependencies::hex_manifest_package\"\n },\n {\n \"name\": \"gleam_core::manifest::ManifestPackage::application_name\"\n },\n {\n \"name\": \"gleam_core::paths::ProjectPaths::build_directory_for_package\"\n },\n {\n \"name\": \"gleam_core::build::project_compiler::ProjectCompiler::load_cache_or_compile_package\"\n },\n {\n \"name\": \"gleam_cli::fs::delete_directory\"\n }\n ],\n \"vendor\": \"Gleam\",\n \"versions\": [\n {\n \"lessThan\": \"v1.19.2-elixir\",\n \"status\": \"affected\",\n \"version\": \"v0.32.4-elixir\",\n \"versionType\": \"other\"\n },\n {\n \"lessThan\": \"v1.19.2-erlang\",\n \"status\": \"affected\",\n \"version\": \"v0.32.4-erlang\",\n \"versionType\": \"other\"\n },\n {\n \"lessThan\": \"v1.19.2-node\",\n \"status\": \"affected\",\n \"version\": \"v0.32.4-node\",\n \"versionType\": \"other\"\n },\n {\n \"lessThan\": \"v1.19.2-node-slim\",\n \"status\": \"affected\",\n \"version\": \"v0.32.4-node-slim\",\n \"versionType\": \"other\"\n },\n {\n \"lessThan\": \"v1.19.2-elixir-slim\",\n \"status\": \"affected\",\n \"version\": \"v0.32.4-elixir-slim\",\n \"versionType\": \"other\"\n },\n {\n \"lessThan\": \"v1.19.2-erlang-slim\",\n \"status\": \"affected\",\n \"version\": \"v0.32.4-erlang-slim\",\n \"versionType\": \"other\"\n },\n {\n \"lessThan\": \"v1.19.2-erlang-alpine\",\n \"status\": \"affected\",\n \"version\": \"v0.32.4-erlang-alpine\",\n \"versionType\": \"other\"\n },\n {\n \"lessThan\": \"v1.19.2-elixir-alpine\",\n \"status\": \"affected\",\n \"version\": \"v0.32.4-elixir-alpine\",\n \"versionType\": \"other\"\n },\n {\n \"lessThan\": \"v1.19.2-node-alpine\",\n \"status\": \"affected\",\n \"version\": \"v0.32.4-node-alpine\",\n \"versionType\": \"other\"\n },\n {\n \"lessThan\": \"v1.19.2-scratch\",\n \"status\": \"affected\",\n \"version\": \"v0.32.4-scratch\",\n \"versionType\": \"other\"\n }\n ]\n }"},{"ecosystem":"https://github.com","name":"gleam-lang/gleam","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"collectionURL\": \"https://github.com\",\n \"cpes\": [\n \"cpe:2.3:a:gleam-lang:gleam:*:*:*:*:*:*:*:*\"\n ],\n \"defaultStatus\": \"unaffected\",\n \"modules\": [\n \"gleam_cli::dependencies\",\n \"gleam_core::manifest\",\n \"gleam_core::paths\",\n \"gleam_core::build::project_compiler\",\n \"gleam_cli::fs\"\n ],\n \"packageName\": \"gleam-lang/gleam\",\n \"packageURL\": \"pkg:github/gleam-lang/gleam\",\n \"product\": \"Gleam\",\n \"programFiles\": [\n \"compiler-cli/src/dependencies.rs\",\n \"compiler-core/src/manifest.rs\",\n \"compiler-core/src/paths.rs\",\n \"compiler-core/src/build/project_compiler.rs\",\n \"compiler-cli/src/fs.rs\"\n ],\n \"programRoutines\": [\n {\n \"name\": \"gleam_cli::dependencies::hex_manifest_package\"\n },\n {\n \"name\": \"gleam_core::manifest::ManifestPackage::application_name\"\n },\n {\n \"name\": \"gleam_core::paths::ProjectPaths::build_directory_for_package\"\n },\n {\n \"name\": \"gleam_core::build::project_compiler::ProjectCompiler::load_cache_or_compile_package\"\n },\n {\n \"name\": \"gleam_cli::fs::delete_directory\"\n }\n ],\n \"repo\": \"https://github.com/gleam-lang/gleam\",\n \"vendor\": \"Gleam\",\n \"versions\": [\n {\n \"changes\": [\n {\n \"at\": \"d15c981fac6e533d70ac8ee89a6ef4dbf139adc3\",\n \"status\": \"unaffected\"\n },\n {\n \"at\": \"54bbb2b98af1505b6eed93c45b1936fc76412e5c\",\n \"status\": \"unaffected\"\n }\n ],\n \"lessThan\": \"*\",\n \"status\": \"affected\",\n \"version\": \"d13f27ee80aae7a521d2e9433c4deaf53f892574\",\n \"versionType\": \"git\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":5.9,"severity":"MEDIUM"}],"references":["https://github.com/gleam-lang/gleam/security/advisories/GHSA-jhcr-c7qm-8589","https://cna.erlef.org/cves/CVE-2026-103061.html","https://osv.dev/vulnerability/EEF-CVE-2026-103061","https://github.com/gleam-lang/gleam/commit/d13f27ee80aae7a521d2e9433c4deaf53f892574","https://github.com/gleam-lang/gleam/commit/d15c981fac6e533d70ac8ee89a6ef4dbf139adc3","https://github.com/gleam-lang/gleam/commit/54bbb2b98af1505b6eed93c45b1936fc76412e5c"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-103061","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-103061","identifiers":["CVE-2026-103061"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-09T09:04:02.9162191+00:00","complete":true,"records":1769,"lastAttemptAt":"2026-11-09T09:04:02.9162191+00:00","lastSuccessAt":"2026-11-09T09:04:03.0760313+00:00","error":null,"lastVerifiedAt":"2026-11-09T09:04:03.0760345+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-24e6fde7b744113daefb8f6135035fb8a5c69c9617c9c0d40574a0376532ffd3-0ea295a9c399a04b3ab57ccec2161d0d1cc039ee9ab5c4d8b6299048bd56b277","complete":true,"records":421333,"lastAttemptAt":"2026-11-09T09:02:14.7013141+00:00","lastSuccessAt":"2026-11-09T09:02:14.6291653+00:00","error":null,"lastVerifiedAt":"2026-11-09T09:02:14.7013141+00:00","snapshotPublishedAt":"2026-11-09T08:31:17+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-f975b42a7c2d46f6899c3d764d777217","complete":false,"records":13654,"lastAttemptAt":"2026-11-09T09:16:12.2541949+00:00","lastSuccessAt":"2026-11-09T09:16:12.249+00:00","error":"7 identifier lookups failed; latest failures include HTTP 403. Other identifiers were checked independently.","lastVerifiedAt":"2026-11-09T09:16:12.249+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13699,"expectedIdentifiers":13706,"failedIdentifiers":7},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-09T09:04:02.9162191+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-09T09:04:02.9162191+00:00","lastSuccessAt":"2026-11-09T09:04:03.197028+00:00","error":null,"lastVerifiedAt":"2026-11-09T09:04:03.1970284+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-156d67f0b09643159ff4bd684ee896db","complete":true,"records":13666,"lastAttemptAt":"2026-11-09T09:04:03.6692263+00:00","lastSuccessAt":"2026-11-09T07:04:26.209+00:00","error":null,"lastVerifiedAt":"2026-11-09T07:04:26.209+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13706,"expectedIdentifiers":13706,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-980593e6977a6d1b4fb1eed5a1ffe88a468736f89f0a06f710924ad59132c023","complete":true,"records":9914,"lastAttemptAt":"2026-11-09T09:04:02.7750454+00:00","lastSuccessAt":"2026-11-08T11:07:07.068788+00:00","error":null,"lastVerifiedAt":"2026-11-09T09:04:02.7750454+00:00","snapshotPublishedAt":"2026-11-08T11:02:46+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-fde804134ecdda0ddd5ff5c26ee1fff5a6fa659311f7ef2e51c6ad54964db0e2","complete":true,"records":1971,"lastAttemptAt":"2026-11-09T09:02:14.7586225+00:00","lastSuccessAt":"2026-11-06T19:03:17.0399903+00:00","error":null,"lastVerifiedAt":"2026-11-09T09:02:14.7586225+00:00","snapshotPublishedAt":"2026-11-06T18:17:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-f6d341f4320a5a0c059c28102ee651c3dd06abc87b84d2bafa4e2a823ec07d35","complete":true,"records":3056,"lastAttemptAt":"2026-11-09T09:04:02.8843128+00:00","lastSuccessAt":"2026-11-09T05:02:23.1539412+00:00","error":null,"lastVerifiedAt":"2026-11-09T09:04:02.8843128+00:00","snapshotPublishedAt":"2026-11-09T04:47:48+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-d0592215f99679f1cc533698c7c7cf50c306057d38021110cecb15015dc78137","complete":true,"records":231297,"lastAttemptAt":"2026-11-09T09:04:02.4970329+00:00","lastSuccessAt":"2026-11-09T09:04:00.7848047+00:00","error":null,"lastVerifiedAt":"2026-11-09T09:04:02.4970329+00:00","snapshotPublishedAt":"2026-11-09T08:33:22+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}