{"containers":{"cna":{"affected":[{"cpes":["cpe:2.3:a:gleam-lang:gleam:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["compiler-cli"],"packageName":"gleam","packageURL":"pkg:sid/gleam.run/gleam","product":"Gleam","programFiles":["compiler-cli/src/dependencies.rs"],"programRoutines":[{"name":"compiler_cli::dependencies::remove_extra_packages"},{"name":"compiler_cli::dependencies::LocalPackages::read_from_disc"},{"name":"compiler_cli::dependencies::LocalPackages::extra_local_packages"}],"vendor":"Gleam","versions":[{"lessThan":"1.17.0","status":"affected","version":"0.18.0-rc1","versionType":"semver"}]},{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:gleam-lang:gleam:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["compiler-cli"],"packageName":"gleam-lang/gleam","packageURL":"pkg:github/gleam-lang/gleam","product":"Gleam","programFiles":["compiler-cli/src/dependencies.rs"],"programRoutines":[{"name":"compiler_cli::dependencies::remove_extra_packages"},{"name":"compiler_cli::dependencies::LocalPackages::read_from_disc"},{"name":"compiler_cli::dependencies::LocalPackages::extra_local_packages"}],"repo":"https://github.com/gleam-lang/gleam","vendor":"Gleam","versions":[{"lessThan":"1.17.0","status":"affected","version":"0.18.0-rc1","versionType":"semver"},{"lessThan":"690ca069817bee5f77a28fc3e360627c1da19291","status":"affected","version":"ed7aec0484f10d60978b63788c8a6497590855ab","versionType":"git"}]},{"collectionURL":"https://ghcr.io","cpes":["cpe:2.3:a:gleam-lang:gleam:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["compiler-cli"],"packageName":"gleam-lang/gleam","packageURL":"pkg:oci/gleam?repository_url=ghcr.io/gleam-lang","product":"Gleam","programFiles":["compiler-cli/src/dependencies.rs"],"programRoutines":[{"name":"compiler_cli::dependencies::remove_extra_packages"},{"name":"compiler_cli::dependencies::LocalPackages::read_from_disc"},{"name":"compiler_cli::dependencies::LocalPackages::extra_local_packages"}],"vendor":"Gleam","versions":[{"lessThan":"v1.17.0-elixir","status":"affected","version":"v0.18.0-rc1-elixir","versionType":"other"},{"lessThan":"v1.17.0-erlang","status":"affected","version":"v0.18.0-rc1-erlang","versionType":"other"},{"lessThan":"v1.17.0-node","status":"affected","version":"v0.18.0-rc1-node","versionType":"other"},{"lessThan":"v1.17.0-node-slim","status":"affected","version":"v0.18.0-rc1-node-slim","versionType":"other"},{"lessThan":"v1.17.0-elixir-slim","status":"affected","version":"v0.18.0-rc1-elixir-slim","versionType":"other"},{"lessThan":"v1.17.0-erlang-slim","status":"affected","version":"v0.18.0-rc1-erlang-slim","versionType":"other"},{"lessThan":"v1.17.0-erlang-alpine","status":"affected","version":"v0.18.0-rc1-erlang-alpine","versionType":"other"},{"lessThan":"v1.17.0-elixir-alpine","status":"affected","version":"v0.18.0-rc1-elixir-alpine","versionType":"other"},{"lessThan":"v1.17.0-node-alpine","status":"affected","version":"v0.18.0-rc1-node-alpine","versionType":"other"},{"lessThan":"v1.17.0-scratch","status":"affected","version":"v0.18.0-rc1-scratch","versionType":"other"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:gleam-lang:gleam:*:*:*:*:*:*:*:*","versionEndExcluding":"1.17.0","versionStartIncluding":"0.18.0-rc1","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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 Männchen / EEF"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p>Path traversal vulnerability in Gleam's dependency management allows arbitrary directory deletion via malicious <tt>build/packages/packages.toml</tt> content.</p><p>Package keys read from <tt>build/packages/packages.toml</tt> by <tt>LocalPackages::read_from_disc</tt> are passed without validation to <tt>paths.build_packages_package()</tt>, which constructs a filesystem path by joining the project build directory with the attacker-controlled key. The resulting path is then passed to <tt>fs::delete_directory</tt> (which calls <tt>remove_dir_all</tt>). No check is performed to ensure the path remains within the intended <tt>build/packages/</tt> directory. Both absolute paths and relative traversal sequences (e.g. <tt>../</tt>) are accepted as package keys, allowing deletion of arbitrary directories.</p><p>An attacker who can cause a victim to run <tt>gleam deps download</tt> on a project containing a malicious <tt>build/packages/packages.toml</tt> (e.g. by committing the normally-gitignored file to a repository) can cause arbitrary directories on the victim's system to be recursively deleted.</p><p>This issue affects Gleam from 0.18.0-rc1 until 1.17.0.</p>"}],"value":"Path traversal vulnerability in Gleam's dependency management allows arbitrary directory deletion via malicious build/packages/packages.toml content.\n\nPackage keys read from build/packages/packages.toml by LocalPackages::read_from_disc are passed without validation to paths.build_packages_package(), which constructs a filesystem path by joining the project build directory with the attacker-controlled key. The resulting path is then passed to fs::delete_directory (which calls remove_dir_all). No check is performed to ensure the path remains within the intended build/packages/ directory. Both absolute paths and relative traversal sequences (e.g. ../) are accepted as package keys, allowing deletion of arbitrary directories.\n\nAn attacker who can cause a victim to run gleam deps download on a project containing a malicious build/packages/packages.toml (e.g. by committing the normally-gitignored file to a repository) can cause arbitrary directories on the victim's system to be recursively deleted.\n\nThis issue affects Gleam from 0.18.0-rc1 until 1.17.0."}],"impacts":[{"capecId":"CAPEC-139","descriptions":[{"lang":"en","value":"CAPEC-139 Relative Path Traversal"}]},{"capecId":"CAPEC-597","descriptions":[{"lang":"en","value":"CAPEC-597 Absolute Path Traversal"}]}],"metrics":[{"cvssV4_0":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"LOCAL","baseScore":5.6,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"ACTIVE","vectorString":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-22","description":"CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-06-02T13:41:37.421Z","orgId":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","shortName":"EEF"},"references":[{"tags":["vendor-advisory","related"],"url":"https://github.com/gleam-lang/gleam/security/advisories/GHSA-jqvf-f6p2-wrv3"},{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-43965.html"},{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-43965"},{"tags":["patch"],"url":"https://github.com/gleam-lang/gleam/commit/690ca069817bee5f77a28fc3e360627c1da19291"}],"source":{"discovery":"EXTERNAL"},"title":"Path Traversal in build/packages/packages.toml Allows Arbitrary Directory Deletion","x_generator":{"engine":"cvelib 1.8.0"}}},"cveMetadata":{"assignerOrgId":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","assignerShortName":"EEF","cveId":"CVE-2026-43965","datePublished":"2026-06-02T13:41:37.421Z","dateReserved":"2026-05-04T18:23:25.573Z","dateUpdated":"2026-06-02T13:41:37.421Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"}