CVE-2026-19589

Published: Aug 17, 2026Modified: Oct 23, 2026

7.1

Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N

Exploitability: 1.8 / Impact: 4.7

Source: security@hashicorp.com (Secondary)

Description

Packer up to 1.15.4 is vulnerable to an issue in the third-party plugin installer that may allow unintended file system modification and could lead to code execution. A user who installs a plugin from a malicious or compromised source may be affected. This vulnerability (CVE-2026-19589) is fixed in Packer 1.16.0.

Related CWEs

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

References (1)

https://discuss.hashicorp.com/t/hcsec-2026-29-packer-vulnerable-to-arbitrary-file-write-via-crafted-plugin-archive-during-installation/77654

Source: security@hashicorp.com

Timeline

No history available yet.