What’s Vulnerable › Vulnerabilities

CVE-2026-23939: Path Traversal in Local File Store Backend

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-26 · updated 2026-06-17
• Weakness: CWE-22

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.

Affected products

• hexpm: from 2014-09-29 before 2026-02-26 — fixed in 2026-02-26

How to fix

Upgrade to a fixed version: hexpm 2026-02-26. Check the vendor advisory for mitigations.

References

• https://cna.erlef.org/cves/CVE-2026-23939.html
• https://github.com/hexpm/hexpm/commit/5d2ccd2f14f45a63225a73fb5b1c937baf36fdc0
• https://github.com/hexpm/hexpm/security/advisories/GHSA-42mv-r64p-4869
• https://osv.dev/vulnerability/EEF-CVE-2026-23939

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