---
title: "CVE-2026-103060: Erlang rebar3 - Path Traversal"
description: "Erlang rebar3 >= 3.7.0-rc1 and < 3.27.2 contains a path traversal caused by improper validation of the app field in package dependencies, letting malicious package publishers delete directories outside the _build directory and write files, exploit requires fetching malicious dependencies."
url: https://panop.io/threat-heartbeat/CVE-2026-103060/
---

# CVE-2026-103060 Erlang rebar3 - Path Traversal

Erlang rebar3 >= 3.7.0-rc1 and < 3.27.2 contains a path traversal caused by improper validation of the app field in package dependencies, letting malicious package publishers delete directories outside the \_build directory and write files, exploit requires fetching malicious dependencies.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.37% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-103060)

## Details

Type

Path Traversal

Impact

File System Write, Denial Of Service

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

12 October 2026

Updated

15 October 2026

Weakness

[CWE-22](https://cwe.mitre.org/data/definitions/22.html)

## Vendor fix

Upgrade to version 3.27.2 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-103060](https://nvd.nist.gov/vuln/detail/CVE-2026-103060)
- [https://github.com/erlang/rebar3/commit/e35282b26e499b1d9e8f30bba9dccd71cd8b02ba](https://github.com/erlang/rebar3/commit/e35282b26e499b1d9e8f30bba9dccd71cd8b02ba)
- [https://github.com/erlang/rebar3/security/advisories/GHSA-6ggr-r7mh-2mv8](https://github.com/erlang/rebar3/security/advisories/GHSA-6ggr-r7mh-2mv8)
- [https://osv.dev/vulnerability/EEF-CVE-2026-103060](https://osv.dev/vulnerability/EEF-CVE-2026-103060)
- [https://cna.erlef.org/cves/CVE-2026-103060.html](https://cna.erlef.org/cves/CVE-2026-103060.html)
- [https://github.com/erlang/rebar3/commit/56b7d88975aa8da6446857cfd92de0825024bf63](https://github.com/erlang/rebar3/commit/56b7d88975aa8da6446857cfd92de0825024bf63)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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