CVE-2026-23939

HIGH 7.5CVE-2026-23939 · Published 26/02/2026 · updated 17/06/2026

In short

CVE-2026-23939 is a HIGH (CVSS 7.5) vulnerability affecting hexpm (hex).
Chance of exploitation in the next 30 days (EPSS): 0.47%, higher than 41.1% of all vulnerabilities.
Fix: update to 2026-02-26 or later.

Package	Affected versions	Patched versions
hexpm hex	`≥ 2014-09-29, < 2026-02-26`	`2026-02-26`

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.

References

cna.erlef.org/cves/CVE-2026-23939.html
hexpm/hexpm commit 5d2ccd2 · Patch
hexpm/hexpm security advisory · Mitigation
osv.dev/vulnerability/EEF-CVE-2026-23939

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Package

Affected versions

Patched versions

hexpm

hex

≥ 2014-09-29, < 2026-02-26

2026-02-26

Description

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