Directory Traversal in OCaml opam .install Field Before

Publication date: 2026-04-16

Last updated on: 2026-06-30

Assigner: MITRE

Description

In OCaml opam before 2.5.1, a .install field containing a destination filepath can use ../ to reach a parent directory.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-04-16

Last Modified

2026-06-30

Generated

2026-07-06

AI Q&A

2026-04-16

EPSS Evaluated

2026-07-05

NVD

CVE-2026-41082

EUVD

EUVD-2026-23288

Affected Vendors & Products

Vendor	Product	Version / Range
ocaml	opam	to 2.5.1 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-24	The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize "../" sequences that can resolve to a location that is outside of that directory.

Attack-Flow Graph

Executive Summary

This vulnerability exists in OCaml opam versions before 2.5.1. It involves the .install field, which specifies a destination filepath. The issue is that this field can include "../" sequences to traverse to a parent directory, potentially allowing files to be installed outside the intended directory.

Impact Analysis

The vulnerability can lead to unauthorized file placement outside the intended directory structure. This may result in overwriting or placing files in sensitive locations, potentially causing integrity issues or enabling further exploitation.

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