Description (CNA)
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. A 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. This issue affects gleam: from 0.32.4 before 1.19.2.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Gleam / Gleam | affected 0.32.4 before 1.19.2 |
| Gleam / Gleam | affected v0.32.4-elixir before v1.19.2-elixir; affected v0.32.4-erlang before v1.19.2-erlang; affected v0.32.4-node before v1.19.2-node; affected v0.32.4-node-slim before v1.19.2-node-slim; affected v0.32.4-elixir-slim before v1.19.2-elixir-slim; affected v0.32.4-erlang-slim before v1.19.2-erlang-slim; affected v0.32.4-erlang-alpine before v1.19.2-erlang-alpine; affected v0.32.4-elixir-alpine before v1.19.2-elixir-alpine; affected v0.32.4-node-alpine before v1.19.2-node-alpine; affected v0.32.4-scratch before v1.19.2-scratch |
| Gleam / Gleam | affected d13f27ee80aae7a521d2e9433c4deaf53f892574 before * |
CWE
CWE-22
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
ADP enrichment
No English description supplied.
No references supplied.