{"id":"CVE-2026-103060","summary":"Path traversal in rebar3 via unvalidated dependency app names","details":"Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in erlang rebar3 allows a malicious package publisher to delete a directory outside the project's _build directory and extract package files into it when a developer fetches dependencies.\n\nA package release's dependencies in a Hex registry carry an app field that names the dependency's OTP application. rebar3 uses this field as the dependency's name without validating it (rebar_packages:parse_deps/1) and builds the dependency's directory from that name (rebar_app_utils:dep_to_app/7). rebar_fetch:download_source_online/2 deletes that directory with rm -rf and moves the fetched package into it. 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. When a project depends on such a release directly or transitively, rebar3 get-deps deletes the directory the name resolves to and writes the dependency's files there. This happens before the dependency's own rebar.config.script is evaluated, and get-deps compiles nothing.\n\nThis issue affects rebar3: from 3.7.0-rc1 before 3.27.2.","aliases":["EEF-CVE-2026-103060","GHSA-6ggr-r7mh-2mv8"],"modified":"2026-10-13T02:45:30.747835963Z","published":"2026-10-12T15:43:57.636Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103060.json","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"3.7.0-rc1"},{"fixed":"3.27.2"}]}],"cna_assigner":"EEF","cwe_ids":["CWE-22"]},"references":[{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-103060.html"},{"type":"WEB","url":"https://github.com"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103060.json"},{"type":"PACKAGE","url":"https://github.com/erlang/rebar3"},{"type":"FIX","url":"https://github.com/erlang/rebar3/commit/56b7d88975aa8da6446857cfd92de0825024bf63"},{"type":"FIX","url":"https://github.com/erlang/rebar3/commit/e35282b26e499b1d9e8f30bba9dccd71cd8b02ba"},{"type":"ADVISORY","url":"https://github.com/erlang/rebar3/security/advisories/GHSA-6ggr-r7mh-2mv8"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-103060"},{"type":"WEB","url":"https://osv.dev/vulnerability/EEF-CVE-2026-103060"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/erlang/rebar3","events":[{"introduced":"56b7d88975aa8da6446857cfd92de0825024bf63"},{"fixed":"e35282b26e499b1d9e8f30bba9dccd71cd8b02ba"}]}],"versions":["3.27.1","3.27.0","3.26.0","3.25.1","3.25.0","3.24.0","3.23.0","3.22.1","3.22.0","3.21.0","3.20.0","3.19.0","3.18.0","3.17.0","3.16.1","3.15.1","3.16.0","3.15.0","3.14.4","3.14.2","3.14.1","3.14.0","3.14.0-rc2","3.14.0-rc1","3.13.0","3.12.0","3.11.1","3.11.0","3.9.1","3.9.0","3.8.0","3.7.5","3.7.4","3.7.3","3.7.2","3.7.1","3.7.0","3.7.0-rc2","3.7.0-rc1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103060.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}]}