CVE-2026-23939

High

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.

SeverityHigh

CVSS7.5

Exploit probability—

ProductHexpm

PublishedFeb 26, 2026

First seenFeb 26, 2026

Weakness typeCWE-22Path traversal

How to fix

Update

hex hexpm2026-02-26 or later

Patches

github.com/hexpm/hexpm/commit/5d2ccd2f14f45a63225a73fb5b1c937baf36fdc0

Vendor advisories

github.com/hexpm/hexpm/security/advisories/GHSA-42mv-r64p-4869

Affected products

Product	Affected versions	Fixed in
hex hexpm	2014-09-29 ≤ v < 2026-02-26	2026-02-26

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