CVE-2026-43965
- Source
- https://cve.org/CVERecord?id=CVE-2026-43965
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43965.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-43965
- Aliases
-
- EEF-CVE-2026-43965
- GHSA-jqvf-f6p2-wrv3
- Downstream
- Related
- Published
- 2026-06-02T13:41:37.421Z
- Modified
- 2026-07-24T03:56:43.247716185Z
- Severity
-
- 5.6 (Medium) CVSS_V4 - 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 CVSS Calculator
- Summary
- Path Traversal in build/packages/packages.toml Allows Arbitrary Directory Deletion
- Details
-
Path traversal vulnerability in Gleam's dependency management allows arbitrary directory deletion via malicious build/packages/packages.toml content.
Package keys read from build/packages/packages.toml by LocalPackages::readfromdisc are passed without validation to paths.buildpackagespackage(), which constructs a filesystem path by joining the project build directory with the attacker-controlled key. The resulting path is then passed to fs::deletedirectory (which calls removedir_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.
An 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.
This issue affects Gleam from 0.18.0-rc1 until 1.17.0.
- Database specific
{ "cwe_ids": [ "CWE-22" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43965.json", "cna_assigner": "EEF", "unresolved_ranges": [ { "source": "AFFECTED_FIELD", "extracted_events": [ { "introduced": "ed7aec0484f10d60978b63788c8a6497590855ab" }, { "fixed": "690ca069817bee5f77a28fc3e360627c1da19291" } ] } ] }- References
-
- https://cna.erlef.org/cves/CVE-2026-43965.html
- https://ghcr.io
- https://github.com
- https://osv.dev/vulnerability/EEF-CVE-2026-43965
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43965.json
- https://github.com/gleam-lang/gleam/security/advisories/GHSA-jqvf-f6p2-wrv3
- https://nvd.nist.gov/vuln/detail/CVE-2026-43965
- https://github.com/gleam-lang/gleam/commit/690ca069817bee5f77a28fc3e360627c1da19291
- https://github.com/gleam-lang/gleam
Affected packages
Git / github.com/gleam-lang/gleam
Affected ranges
- Type
- GIT
- Repo
- https://github.com/gleam-lang/gleam
- Events
- Database specific
{ "source": [ "AFFECTED_FIELD", "REFERENCES" ], "extracted_events": [ { "introduced": "0.18.0-rc1" }, { "fixed": "1.17.0" }, { "introduced": "v0.18.0-rc1-elixir" }, { "fixed": "v1.17.0-elixir" }, { "introduced": "v0.18.0-rc1-erlang" }, { "fixed": "v1.17.0-erlang" }, { "introduced": "v0.18.0-rc1-node" }, { "fixed": "v1.17.0-node" }, { "introduced": "v0.18.0-rc1-node-slim" }, { "fixed": "v1.17.0-node-slim" }, { "introduced": "v0.18.0-rc1-elixir-slim" }, { "fixed": "v1.17.0-elixir-slim" }, { "introduced": "v0.18.0-rc1-erlang-slim" }, { "fixed": "v1.17.0-erlang-slim" }, { "introduced": "v0.18.0-rc1-erlang-alpine" }, { "fixed": "v1.17.0-erlang-alpine" }, { "introduced": "v0.18.0-rc1-elixir-alpine" }, { "fixed": "v1.17.0-elixir-alpine" }, { "introduced": "v0.18.0-rc1-node-alpine" }, { "fixed": "v1.17.0-node-alpine" }, { "introduced": "v0.18.0-rc1-scratch" }, { "fixed": "v1.17.0-scratch" } ] }