CVE-2026-23939

Path Traversal in Local File Store Backend

State: Published
Severity: 6.9 Medium
Published: Feb 26, 2026
Updated: Sep 16, 2026
Reserved: Jan 19, 2026

Description

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in hexpm hexpm/hexpm ('Elixir.Hexpm.Store.Local' module) allows Relative Path Traversal. This vulnerability is associated with program files lib/hexpm/store/local.ex and program routines 'Elixir.Hexpm.Store.Local':get/3, 'Elixir.Hexpm.Store.Local':put/4, 'Elixir.Hexpm.Store.Local':delete/2, 'Elixir.Hexpm.Store.Local':delete_many/2.

This issue does NOT affect hex.pm the service. Only self-hosted deployments using the Local Storage backend are affected.

This issue affects hexpm: from 931ee0ed46fa89218e0400a4f6e6d15f96406050 before 5d2ccd2f14f45a63225a73fb5b1c937baf36fdc0.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N	EEF

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Affected Products

Product	Versions
hexpmhexpm	931ee0ed46fa89218e0400a4f6e6d15f96406050 to before 5d2ccd2f14f45a63225a73fb5b1c937baf36fdc0Affected

References

https://github.com/hexpm/hexpm/security/advisories/GHSA-42mv-r64p-4869vendor-advisoryrelated
https://cna.erlef.org/cves/CVE-2026-23939.htmlrelated
https://osv.dev/vulnerability/EEF-CVE-2026-23939related
https://github.com/hexpm/hexpm/commit/5d2ccd2f14f45a63225a73fb5b1c937baf36fdc0patch

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