Vulnerability · Published Feb 26, 2026 · Assigned by EEF

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

Medium 6.9

In plain English

A medium-severity path traversal in hexpm from hexpm. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).

Severity (CVSS 4.0)6.9Medium

Exploit odds (30 days)0.5%top 58.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
hexpm	hexpm	931ee0ed46fa89218e0400a4f6e6d15f96406050 – before 5d2ccd2f14f45a63225a73fb5b1c937baf36fdc0

Weakness: CWE-22 · Vector: 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

References

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