CVE-2026-32146 (GCVE-0-2026-32146)
Vulnerability from cvelistv5 – Published: 2026-04-11 12:59 – Updated: 2026-04-14 09:24
VLAI?
Title
Improper Path Validation in Git Dependency Handling Allows Arbitrary File System Modification
Summary
Improper path validation vulnerability in the Gleam compiler's handling of git dependencies allows arbitrary file system modification during dependency download.
Dependency names from gleam.toml and manifest.toml are incorporated into filesystem paths without sufficient validation or confinement to the intended dependency directory, allowing attacker-controlled paths (via relative traversal such as ../ or absolute paths) to target filesystem locations outside that directory. When resolving git dependencies (e.g. via gleam deps download), the computed path is used for filesystem operations including directory deletion and creation.
This vulnerability occurs during the dependency resolution and download phase, which is generally expected to be limited to fetching and preparing dependencies within a confined directory. A malicious direct or transitive git dependency can exploit this issue to delete and overwrite arbitrary directories outside the intended dependency directory, including attacker-chosen absolute paths, potentially causing data loss. In some environments, this may be further leveraged to achieve code execution, for example by overwriting git hooks or shell configuration files.
This issue affects Gleam from 1.9.0-rc1 until 1.15.4.
Severity ?
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
| URL | Tags | |
|---|---|---|
Impacted products
| Vendor | Product | Version | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gleam | Gleam |
Affected:
1.9.0-rc1 , < *
(semver)
|
||||||||||||
|
||||||||||||||
Credits
John Downey
Louis Pilfold
Jonatan Männchen / EEF
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\"vulnConfidentialityImpact\": \"NONE\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"Gleam\", \"product\": \"Gleam\", \"versions\": [{\"status\": \"affected\", \"changes\": [{\"at\": \"1.15.4\", \"status\": \"unaffected\"}], \"version\": \"1.9.0-rc1\", \"lessThan\": \"*\", \"versionType\": \"semver\"}], \"packageURL\": \"pkg:sid/gleam.run/gleam\", \"packageName\": \"gleam\", \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://github.com/gleam-lang/gleam\", \"vendor\": \"Gleam\", \"product\": \"Gleam\", \"versions\": [{\"status\": \"affected\", \"changes\": [{\"at\": \"1.15.4\", \"status\": \"unaffected\"}], \"version\": \"1.9.0-rc1\", \"lessThan\": \"*\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"changes\": [{\"at\": \"92aae3913570e8d8962f6399404777d313045bfa\", \"status\": \"unaffected\"}, {\"at\": \"2dc0467f822c75de94697a912755d172928ee40a\", \"status\": \"unaffected\"}], \"version\": \"a4fde22445ab8e5cc79c2ff48971616cb570702c\", \"lessThan\": \"*\", \"versionType\": \"git\"}], \"packageURL\": \"pkg:github/gleam-lang/gleam\", \"packageName\": \"gleam-lang/gleam\", \"collectionURL\": \"https://github.com\", \"defaultStatus\": \"unaffected\"}, {\"vendor\": \"Gleam\", \"product\": \"Gleam\", \"versions\": [{\"status\": \"affected\", \"version\": \"v1.9.0-rc1-elixir\", \"lessThan\": \"v1.15.4-elixir\", \"versionType\": \"other\"}, {\"status\": \"affected\", \"version\": \"v1.9.0-rc1-erlang\", \"lessThan\": \"v1.15.4-erlang\", \"versionType\": \"other\"}, {\"status\": \"affected\", \"version\": \"v1.9.0-rc1-node\", \"lessThan\": \"v1.15.4-node\", \"versionType\": \"other\"}, {\"status\": \"affected\", \"version\": \"v1.9.0-rc1-node-slim\", \"lessThan\": \"v1.15.4-node-slim\", \"versionType\": \"other\"}, {\"status\": \"affected\", \"version\": \"v1.9.0-rc1-elixir-slim\", \"lessThan\": \"v1.15.4-elixir-slim\", \"versionType\": \"other\"}, {\"status\": \"affected\", \"version\": \"v1.9.0-rc1-erlang-slim\", \"lessThan\": \"v1.15.4-erlang-slim\", \"versionType\": \"other\"}, {\"status\": \"affected\", \"version\": \"v1.9.0-rc1-erlang-alpine\", \"lessThan\": \"v1.15.4-erlang-alpine\", \"versionType\": \"other\"}, {\"status\": \"affected\", \"version\": \"v1.9.0-rc1-elixir-alpine\", \"lessThan\": \"v1.15.4-elixir-alpine\", \"versionType\": \"other\"}, {\"status\": \"affected\", \"version\": \"v1.9.0-rc1-node-alpine\", \"lessThan\": \"v1.15.4-node-alpine\", \"versionType\": \"other\"}, {\"status\": \"affected\", \"version\": \"v1.9.0-rc1-scratch\", \"lessThan\": \"v1.15.4-scratch\", \"versionType\": \"other\"}], \"packageURL\": \"pkg:oci/gleam?repository_url=ghcr.io/gleam-lang\", \"packageName\": \"gleam-lang/gleam\", \"collectionURL\": \"https://ghcr.io\", \"defaultStatus\": \"unaffected\"}], \"solutions\": [{\"lang\": \"en\", \"value\": \"Upgrade to Gleam 1.15.4 or later.\\n\\nBoth patches must be applied: the original incomplete fix (1aa5d8e594b0aa240bb213fce6ee19c65e6d5bcf, backported as 55bb36e6d7febfbbc48c4d001e0ae13eb0312d78 to 1.15) and the follow-up fix (2dc0467f822c75de94697a912755d172928ee40a, backported as 92aae3913570e8d8962f6399404777d313045bfa to 1.15). Gleam 1.15.4 includes both.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eUpgrade to Gleam 1.15.4 or later.\u003c/p\u003e\u003cp\u003eBoth patches must be applied: the original incomplete fix (\u003ctt\u003e1aa5d8e594b0aa240bb213fce6ee19c65e6d5bcf\u003c/tt\u003e, backported as \u003ctt\u003e55bb36e6d7febfbbc48c4d001e0ae13eb0312d78\u003c/tt\u003e to 1.15) and the follow-up fix (\u003ctt\u003e2dc0467f822c75de94697a912755d172928ee40a\u003c/tt\u003e, backported as \u003ctt\u003e92aae3913570e8d8962f6399404777d313045bfa\u003c/tt\u003e to 1.15). Gleam 1.15.4 includes both.\u003c/p\u003e\", \"base64\": false}]}], \"references\": [{\"url\": \"https://github.com/gleam-lang/gleam/security/advisories/GHSA-vq5j-55vx-wq8j\", \"tags\": [\"vendor-advisory\", \"related\"]}, {\"url\": \"https://cna.erlef.org/cves/CVE-2026-32146.html\", \"tags\": [\"related\"]}, {\"url\": \"https://osv.dev/vulnerability/EEF-CVE-2026-32146\", \"tags\": [\"related\"]}, {\"url\": \"https://github.com/gleam-lang/gleam/commit/1aa5d8e594b0aa240bb213fce6ee19c65e6d5bcf\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/gleam-lang/gleam/commit/2dc0467f822c75de94697a912755d172928ee40a\", \"tags\": [\"patch\"]}], \"workarounds\": [{\"lang\": \"en\", \"value\": \"* Avoid using untrusted git dependencies, especially without pinning to a specific commit SHA\\n* Review dependency trees carefully, including transitive git dependencies\\n* Run dependency resolution commands in a restricted or isolated environment (e.g. containers)\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cul\u003e\u003cli\u003eAvoid using untrusted git dependencies, especially without pinning to a specific commit SHA\u003c/li\u003e\u003cli\u003eReview dependency trees carefully, including transitive git dependencies\u003c/li\u003e\u003cli\u003eRun dependency resolution commands in a restricted or isolated environment (e.g. containers)\u003c/li\u003e\u003c/ul\u003e\", \"base64\": false}]}], \"x_generator\": {\"engine\": \"Vulnogram 0.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Improper path validation vulnerability in the Gleam compiler\u0027s handling of git dependencies allows arbitrary file system modification during dependency download.\\n\\nDependency names from gleam.toml and manifest.toml are incorporated into filesystem paths without sufficient validation or confinement to the intended dependency directory, allowing attacker-controlled paths (via relative traversal such as ../ or absolute paths) to target filesystem locations outside that directory. When resolving git dependencies (e.g. via gleam deps download), the computed path is used for filesystem operations including directory deletion and creation.\\n\\nThis vulnerability occurs during the dependency resolution and download phase, which is generally expected to be limited to fetching and preparing dependencies within a confined directory. A malicious direct or transitive git dependency can exploit this issue to delete and overwrite arbitrary directories outside the intended dependency directory, including attacker-chosen absolute paths, potentially causing data loss. In some environments, this may be further leveraged to achieve code execution, for example by overwriting git hooks or shell configuration files.\\n\\nThis issue affects Gleam from 1.9.0-rc1 until 1.15.4.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Improper path validation vulnerability in the Gleam compiler\u0027s handling of git dependencies allows arbitrary file system modification during dependency download.\u003cp\u003eDependency names from \u003ctt\u003egleam.toml\u003c/tt\u003e and \u003ctt\u003emanifest.toml\u003c/tt\u003e are incorporated into filesystem paths without sufficient validation or confinement to the intended dependency directory, allowing attacker-controlled paths (via relative traversal such as \u003ctt\u003e../\u003c/tt\u003e or absolute paths) to target filesystem locations outside that directory. When resolving git dependencies (e.g. via \u003ctt\u003egleam deps download\u003c/tt\u003e), the computed path is used for filesystem operations including directory deletion and creation.\u003c/p\u003e\u003cp\u003eThis vulnerability occurs during the dependency resolution and download phase, which is generally expected to be limited to fetching and preparing dependencies within a confined directory. A malicious direct or transitive git dependency can exploit this issue to delete and overwrite arbitrary directories outside the intended dependency directory, including attacker-chosen absolute paths, potentially causing data loss. In some environments, this may be further leveraged to achieve code execution, for example by overwriting git hooks or shell configuration files.\u003c/p\u003e\u003cp\u003eThis issue affects Gleam from 1.9.0-rc1 until 1.15.4.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-22\", \"description\": \"CWE-22 Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)\"}]}], \"configurations\": [{\"lang\": \"en\", \"value\": \"The project must use git-based dependencies (direct or transitive), or the victim must run gleam deps download on a repository with a malicious manifest.toml lockfile. Projects that exclusively use Hex dependencies and do not clone untrusted repositories are not affected.\\n\\nProjects that exclusively use trusted or personally controlled git dependencies, or dependencies pinned to verified commit SHAs, are not exposed.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eThe project must use git-based dependencies (direct or transitive), or the victim must run \u003ctt\u003egleam deps download\u003c/tt\u003e on a repository with a malicious \u003ctt\u003emanifest.toml\u003c/tt\u003e lockfile. Projects that exclusively use Hex dependencies and do not clone untrusted repositories are not affected.\u003c/p\u003e\u003cp\u003eProjects that exclusively use trusted or personally controlled git dependencies, or dependencies pinned to verified commit SHAs, are not exposed.\u003c/p\u003e\", \"base64\": false}]}], \"providerMetadata\": {\"orgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"shortName\": \"EEF\", \"dateUpdated\": \"2026-04-14T09:24:53.083Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-32146\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-04-14T09:24:53.083Z\", \"dateReserved\": \"2026-03-10T22:37:29.213Z\", \"assignerOrgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"datePublished\": \"2026-04-11T12:59:22.911Z\", \"assignerShortName\": \"EEF\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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