{"affected":[{"ranges":[{"events":[{"introduced":"61ed8deb6572b5591ad17d6302c1a38607522f16"},{"fixed":"81570611906b6b0039c948037094d09a68700f3a"}],"repo":"https://github.com/gleam-lang/gleam","type":"GIT"}]}],"aliases":["GHSA-wjx8-7w8m-p4v7","CVE-2026-32685"],"credits":[{"name":"evipepota","type":"FINDER"},{"name":"evipepota","type":"REMEDIATION_DEVELOPER"},{"name":"Louis Pilfold","type":"REMEDIATION_REVIEWER"},{"name":"Jonatan Männchen / EEF","type":"ANALYST"}],"database_specific":{"capec_ids":["CAPEC-139","CAPEC-597"],"cpe_ids":["cpe:2.3:a:gleam-lang:gleam:*:*:*:*:*:*:*:*"],"cwe_ids":["CWE-22"]},"details":"## Summary\n\nPath traversal vulnerability in Gleam's handling of custom documentation pages allows arbitrary file read and file write outside the intended documentation output directory.\n\nThe documentation.pages entries from gleam.toml are incorporated into filesystem paths without sufficient validation or confinement to the intended project and documentation output directories. The documentation.pages[].path field can be used to write generated documentation files outside the intended build/dev/docs/<package>/ output directory. The documentation.pages[].source field can be used to read files outside the project directory and embed their contents into generated documentation output.\n\nAn attacker who can convince a victim to run gleam docs build on an untrusted project, or with untrusted gleam.toml content, can cause local files readable by the victim to be included in generated documentation artifacts, and can cause generated documentation files to be written outside the intended docs output directory.\n\nThis issue affects Gleam from 1.16.0 until 1.17.0.\n\n## Workaround\n\n* Avoid running gleam docs build on untrusted projects\n* Review documentation.pages entries in gleam.toml before generating documentation\n* Run documentation generation in a restricted or isolated environment (e.g. containers)\n\n## Configuration\n\nThe project must use custom documentation pages via documentation.pages in gleam.toml, and the victim must run gleam docs build on an untrusted project or with untrusted gleam.toml content. Projects that do not use custom documentation pages are not affected.","id":"EEF-CVE-2026-32685","modified":"2026-06-02T13:41:37.885Z","published":"2026-06-02T13:41:37.885Z","references":[{"type":"ADVISORY","url":"https://github.com/gleam-lang/gleam/security/advisories/GHSA-wjx8-7w8m-p4v7"},{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-32685.html"},{"type":"FIX","url":"https://github.com/gleam-lang/gleam/commit/81570611906b6b0039c948037094d09a68700f3a"},{"type":"FIX","url":"https://github.com/gleam-lang/gleam/commit/c9230cd3045de8fd8481dae3a4557c0146df1430"}],"related":[],"schema_version":"1.7.3","severity":[{"score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","type":"CVSS_V4"}],"summary":"Path Traversal in gleam docs build via documentation.pages Allows Arbitrary File Read and Write","upstream":[]}