CVE-2026-103061

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Source
https://cve.org/CVERecord?id=CVE-2026-103061
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103061.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-103061
Aliases
Published
2026-10-12T18:23:41Z
Modified
2026-10-15T02:30:37Z
Severity
  • 5.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/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 Gleam via unvalidated package application names
Details

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.

Database specific 
{
    "cna_assigner":  "EEF",
    "cwe_ids":  [
        "CWE-22"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103061.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "introduced":  "0.32.4"
                },
                {
                    "fixed":  "1.19.2"
                },
                {
                    "introduced":  "v0.32.4-elixir"
                },
                {
                    "fixed":  "v1.19.2-elixir"
                },
                {
                    "introduced":  "v0.32.4-erlang"
                },
                {
                    "fixed":  "v1.19.2-erlang"
                },
                {
                    "introduced":  "v0.32.4-node"
                },
                {
                    "fixed":  "v1.19.2-node"
                },
                {
                    "introduced":  "v0.32.4-node-slim"
                },
                {
                    "fixed":  "v1.19.2-node-slim"
                },
                {
                    "introduced":  "v0.32.4-elixir-slim"
                },
                {
                    "fixed":  "v1.19.2-elixir-slim"
                },
                {
                    "introduced":  "v0.32.4-erlang-slim"
                },
                {
                    "fixed":  "v1.19.2-erlang-slim"
                },
                {
                    "introduced":  "v0.32.4-erlang-alpine"
                },
                {
                    "fixed":  "v1.19.2-erlang-alpine"
                },
                {
                    "introduced":  "v0.32.4-elixir-alpine"
                },
                {
                    "fixed":  "v1.19.2-elixir-alpine"
                },
                {
                    "introduced":  "v0.32.4-node-alpine"
                },
                {
                    "fixed":  "v1.19.2-node-alpine"
                },
                {
                    "introduced":  "v0.32.4-scratch"
                },
                {
                    "fixed":  "v1.19.2-scratch"
                }
            ],
            "source":  "AFFECTED_FIELD"
        }
    ]
}
References

Affected packages

Git / github.com/gleam-lang/gleam

Affected ranges

Type
GIT
Repo
https://github.com/gleam-lang/gleam
Events
Introduced
d13f27ee80aae7a521d2e9433c4deaf53f892574
Fixed
54bbb2b98af1505b6eed93c45b1936fc76412e5c
Fixed
d13f27ee80aae7a521d2e9433c4deaf53f892574
Fixed
d15c981fac6e533d70ac8ee89a6ef4dbf139adc3
Database specific
Show details 
{
    "source":  "REFERENCES"
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103061.json"